This handy Spectrum Math Grade 4 Answer Key Chapter 2 Posttest provides detailed answers for the workbook questions.
Spectrum Math Grade 4 Chapter 2 Posttest Answers Key
Check What You Learned
Numeration through 1,000,000
Write each number in expanded form.
Question 1.
a. 1,965,012
_________
Answer:
Given that the number is 1,965,012.
The expended form of the number is based on the place value of the number.
The expended form of 1,965,012 is 1,000,000 + 900,000 + 60,000 + 5,000 + 10 + 2.
b. 693,145
_________
Answer:
Given that the number is 693,145.
The expended form of the number is based on the place value of the number.
The expended form of 693,145 is 600,000 + 90,000 + 3,000 + 100 + 40 + 5.
Question 2.
a. 103,458
_________
Answer:
Given that the number is 103,458.
The expended form of the number is based on the place value of the number.
The expended form of 103,458 is 100,000 + 3,000 + 400 + 50 + 8.
b. 23,972
_________
Answer:
Given that the number is 23,972.
The expended form of the number is based on the place value of the number.
The expended form of 23,972 is 20,000 + 3,000 + 900 + 70 + 2.
Question 3.
a. 471,440
_________
Answer:
Given that the number is 471,440.
The expended form of the number is based on the place value of the number.
The expended form of 1,965,012 is
b. 18,321
_________
Answer:
Given that the number is 18,321.
The expended form of the number is based on the place value of the number.
The expended form of 18,321 is 10,000 + 8,000 + 300 + 20 + 1.
Question 4.
a. 98,485
_________
Answer:
Given that the number is 98,485
The expended form of the number is based on the place value of the number.
The expended form of 98,485 is 90,000 + 8,000 + 400 + 80 + 5.
b. 313,082
_________
Answer:
Given that the number is 313,082.
The expended form of the number is based on the place value of the number.
The expended form of 313,082 is 300,000 + 10,000 + 3,000 + 80 + 2.
Write the number word for each number given.
Question 5.
a. 5,012
_________
_________
_________
Answer:
Given that the number is 5,012.
The word form of 5,012 is five thousand and twelve.
b. 102
_________
_________
_________
Answer:
Given that the number is 102.
The word form of 102 is one hundred and two.
c. 1,141
_________
_________
_________
Answer:
Given that the number is 1,141.
The word form of 1,141 is one hundred and two.
d. 99,612
_________
_________
_________
Answer:
Given that the number is 99,612.
The word form of 99,612 is ninety nine thousand six hundred and twelve.
Question 6.
a. 218
_________
_________
_________
Answer:
Given that the number is 218.
The word form of 218 is two hundred and eighteen.
b. 21,812
_________
_________
_________
Answer:
Given that the number is 21,812.
The word form of 21,812 is twenty one thousand eight hundred and twelve.
c. 7,982
_________
_________
_________
Answer:
Given that the number is 7,982.
The word form of 7,982 is seven thousand nine hundred and eighty two.
d. 762
_________
_________
_________
Answer:
Given that the number is 762.
The word form of 762 is seven hundred and sixty two.
Question 7.
a. 456
_________
_________
_________
Answer:
Given that the number is 456.
The word form of 456 is four hundred and fifty six.
b. 123
_________
_________
_________
Answer:
Given that the number is 123.
The word form of 123 is one hundred and twenty three.
c. 934,763
_________
_________
_________
Answer:
Given that the number is 934,763.
The word form of 934,763 is nine lakhs thirty four thousand seven hundred and sixty three.
d. 37,103
_________
_________
_________
Answer:
Given that the number is 37,103.
The word form of 37,103 is thirty seven thousand one hundred and three.
Round each number to the nearest ten thousand.
Question 8.
a. 2,396,473
_________
Answer:
Given that the number is 2,396,473.
Here 6 is in thousands place and 9 in ten thousands place.
6 is greater than 5. so, replace thousands, hundreds tens and ones place with 0 and add 1 to the ten thousands place.
Therefore 2,396,473 rounded to the nearest ten is 2,400,000.
b. 763,465
_________
Answer:
Given that the number is 763,465.
Here 3 is in thousands place and 6 in ten thousands place.
3 is less than 5. so, replace thousands, hundreds tens and ones place with 0.
Therefore 763,465 rounded to the nearest ten is 760,000.
c. 85,123
_________
Answer:
Given that the number is 85,123.
Here 5 is in thousands place and 8 in ten thousands place.
5 is greater than or equal to 5. so, replace thousands, hundreds tens and ones place with 0 and add 1 to the ten thousands place.
Therefore 85,123 rounded to the nearest ten is 90,000.
d. 2,391,362
_________
Answer:
Given that the number is 2,391,362.
Here 1 is in thousands place and 9 in ten thousands place.
1 is less than 5. so, replace thousands, hundreds tens and ones place with 0.
Therefore 2,391,362 rounded to the nearest ten is 2,390,000.
e. 625,104
_________
Answer:
Given that the number is 625,104.
Here 5 is in thousands place and 2 in ten thousands place.
5 is greater than or equal to 5. so, replace thousands, hundreds tens and ones place with 0. add 1 to the ten thousands place.
Therefore 625,104 rounded to the nearest ten is 630,000.
Question 9.
a. 305,419
_________
Answer:
Given that the number is 305,419.
Here 5 is in thousands place and 0 in ten thousands place.
5 is greater than or equal to 5. so, replace thousands, hundreds tens and ones place with 0. add 1 to the ten thousands place.
Therefore 305,419 rounded to the nearest ten is 300,000.
b. 8,939,721
_________
Answer:
Given that the number is 8,939,721.
Here 9 is in thousands place and 3 in ten thousands place.
9 is greater than 5. so, replace thousands, hundreds tens and ones place with 0. Add 1 to the ten thousands place.
Therefore 8,939,721 rounded to the nearest ten is 8,940,000.
c. 434,599
_________
Answer:
Given that the number is 434,599.
Here 4 is in thousands place and 3 in ten thousands place.
4 is less than 5. so, replace thousands, hundreds tens and ones place with 0.
Therefore 434,599 rounded to the nearest ten is 434,000.
d. 49,002
_________
Answer:
Given that the number is 49,002.
Here 9 is in thousands place and 4 in ten thousands place.
9 is greater than 5. so, replace thousands, hundreds tens and ones place with 0. Add 1 to the ten thousands place.
Therefore 49,002 rounded to the nearest ten is 50,000.
e. 2,009,452
_________
Answer:
Given that the number is 2,009,452.
Here 9 is in thousands place and 0 in ten thousands place.
9 is greater than 5. so, replace thousands, hundreds tens and ones place with 0. Add 1 to the ten thousands place.
Therefore 2,009,452 rounded to the nearest ten is 2,000,000.
Round each number to the nearest hundred thousand.
Question 10.
a. 2,952,430
_________
Answer:
Given that the number is 2,952,430.
Here 5 is in ten thousands place and 9 in hundred thousands place.
5 is greater than or equal to 5. so, replace ten thousand, thousands, hundreds tens and ones place with 0. Add 1 to the ten thousands place.
Therefore 2,952,430 rounded to the nearest ten is 3,000,000.
b. 783,210
_________
Answer:
Given that the number is 783,210.
Here 8 is in ten thousands place and 7 in hundred thousands place.
8 is greater than 5. so, replace ten thousand, thousands, hundreds tens and ones place with 0. Add 1 to the ten thousands place.
Therefore 783,210 rounded to the nearest ten is 8,00,000.
c. 3,085,997
_________
Answer:
Given that the number is 3,085,997.
Here 8 is in ten thousands place and 0 in hundred thousands place.
8 is greater than 5. so, replace ten thousand, thousands, hundreds tens and ones place with 0. Add 1 to the ten thousands place.
Therefore 3,085,997 rounded to the nearest ten is 3,100,000.
d. 876,520
_________
Answer:
Given that the number is 876,520.
Here 7 is in ten thousands place and 8 in hundred thousands place.
7 is greater than 5. so, replace ten thousand, thousands, hundreds tens and ones place with 0. Add 1 to the ten thousands place.
Therefore 876,520 rounded to the nearest ten is 900,000.
c. 385,921
_________
Answer:
Given that the number is 385,921.
Here 8 is in ten thousands place and 3 in hundred thousands place.
8 is greater than 5. so, replace ten thousand, thousands, hundreds tens and ones place with 0. Add 1 to the ten thousands place.
Therefore 385,921 rounded to the nearest ten is 400,000.
Question 11.
a. 509,815
_________
Answer:
Given that the number is 509,815.
Here 0 in ten thousands place and 5 in hundred thousands place.
0 is less than 5. so, replace ten thousand, thousands, hundreds tens and ones place with 0.
Therefore 509,815 rounded to the nearest ten is 5,00,000.
b. 7,651,298
_________
Answer:
Given that the number is 7,651,298.
Here 5 in ten thousands place and 6 in hundred thousands place.
5 is greater than or equal to 5. so, replace ten thousand, thousands, hundreds tens and ones place with 0. Add 1 to the hundred thousands place.
Therefore 7,651,298 rounded to the nearest ten is 7,700,000.
c. 198,205
_________
Answer:
Given that the number is 198,205.
Here 9 in ten thousands place and 1 in hundred thousands place.
9 is greater than 5. so, replace ten thousand, thousands, hundreds tens and ones place with 0. Add 1 to the hundred thousands place.
Therefore 198,205 rounded to the nearest ten is 100,000.
d. 6,519,190
_________
Answer:
Given that the number is 6,519,190.
Here 1 in ten thousands place and 5 in hundred thousands place.
1 is less than 5. so, replace ten thousand, thousands, hundreds tens and ones place with 0.
Therefore 6,519,190 rounded to the nearest ten is 6,500,000.
e. 457,213
_________
Answer:
Given that the number is 457,213.
Here 5 in ten thousands place and 4 in hundred thousands place.
5 is greater than or equal to 5. so, replace ten thousand, thousands, hundreds tens and ones place with 0.
Therefore 457,213 rounded to the nearest ten is 500,000.
Round each number to the nearest million.
Question 12.
a. 2,456,997
_________
Answer:
Given that the number is 2,456,997.
Here 4 in hundred thousands place and 2 in million place.
4 is less than 5. so, replace hundred thousand, ten thousand, thousands, hundreds tens and ones place with 0.
Therefore 2,456,997 rounded to the nearest ten is 2,000,000.
b. 9,352,697
_________
Answer:
Given that the number is 9,352,697.
Here 3 in hundred thousands place and 9 in million place.
3 is less than 5. so, replace hundred thousand, ten thousand, thousands, hundreds tens and ones place with 0.
Therefore 9,352,697 rounded to the nearest ten is 9,000,000.
c. 6,976,542
_________
Answer:
Given that the number is 6,976,542.
Here 9 in hundred thousands place and 6 in million place.
9 greater than 5. so, replace hundred thousand, ten thousand, thousands, hundreds tens and ones place with 0. Add 1 to the million place.
Therefore 6,976,542 rounded to the nearest ten is 7,000,000.
d. 4,561,004
_________
Answer:
Given that the number is 4,561,004.
Here 5 in hundred thousands place and 4 in million place.
5 greater than or equal to 5. so, replace hundred thousand, ten thousand, thousands, hundreds tens and ones place with 0. Add 1 to the million place.
Therefore 4,561,004 rounded to the nearest ten is 4,000,000.
e. 7,395,467
_________
Answer:
Given that the number is 7,395,467.
Here 3 in hundred thousands place and 7 in million place.
3 less than 5. so, replace hundred thousand, ten thousand, thousands, hundreds tens and ones place with 0.
Therefore 7,395,467 rounded to the nearest ten 7,000,000.
Question 13.
a. 1,596,412
_________
Answer:
Given that the number is 1,596,412.
Here 5 in hundred thousands place and 1 in million place.
5 is greater than or equal to 5. so, replace hundred thousand, ten thousand, thousands, hundreds tens and ones place with 0. Add 1 to the million place.
Therefore 1,596,412 rounded to the nearest ten 2,000,000.
b. 7,396,732
_________
Answer:
Given that the number is 7,396,732.
Here 3 in hundred thousands place and 7 in million place.
3 less than 5. so, replace hundred thousand, ten thousand, thousands, hundreds tens and ones place with 0.
Therefore 7,396,732 rounded to the nearest ten 7,000,000.
c. 9,235,987
_________
Answer:
Given that the number is 9,235,987.
Here 2 in hundred thousands place and 9 in million place.
2 less than 5. so, replace hundred thousand, ten thousand, thousands, hundreds tens and ones place with 0.
Therefore 9,235,987 rounded to the nearest ten 9,000,000.
d. 3,396,374
_________
Answer:
Given that the number is 3,396,374.
Here 3 in hundred thousands place and 3 in million place.
3 less than 5. so, replace hundred thousand, ten thousand, thousands, hundreds tens and ones place with 0.
Therefore 3,396,374 rounded to the nearest ten 3,000,000.
e. 5,564,320
_________
Answer:
Given that the number is 5,564,320.
Here 5 in hundred thousands place and 5 in million place.
5 is greater than or equal to 5. so, replace hundred thousand, ten thousand, thousands, hundreds tens and ones place with 0. Add 1 to the million place.
Therefore 5,564,320 rounded to the nearest ten 6,000,000.
Compare each pair of numbers. Write >, <, or =.
Question 14.
a. 24,124 ____ 24,224
Answer:
Here ten thousand and thousands place is same then look at the hundreds place.
The hundreds place of 24,124 is less than the hundreds place of 24,224.
So, 24,124 < 24,224
Therefore 24,124 less than 24,224
b. 1,975,212 ____ 1,985,212
Answer:
Here ten lakhs and lakhs place is same. Then look at the ten thousands place.
Ten thousands place 1,975,212 is less than the ten thousands place of 1,985,212.
So, 1,975,212 < 1,985,212.
Therefore 1,975,212 less than 1,985,212.
c. 56,410 ___ 54,408
Answer:
Here ten thousands place is same look at the thousands place.
Thousands place of 56,410 is greater than the thousands place of 54,408.
So, 56,410 > 54,408.
Therefore 56,410 greater than 54,408
Question 15.
a. 509,712 ____ 590,172
Answer:
Here ten lakhs place is same. Then look at the lakhs place.
Lakhs place of 509,712 is less than the lakhs place of 590,172.
So, 509,712 < 590,172.
Therefore 509,712 less than 590,172.
b. 2,341,782 ____ 2,341,782
Answer:
Here both the numbers are same.
So, 2,341,782 = 2,341,782
Therefore 2,341,782 equal to 2,341,782
c. 976,152 ____ 967,932
Answer:
Here lakhs place same in both numbers. Then look at the ten thousands place.
Ten thousands place of 976,152 greater than the ten thousands place of 967,932.
So, 976,152 > 967,932.
Therefore 976,152 greater than 967,932
Question 16.
a. 6,918 ____ 6,818
Answer:
Here thousands place is same in both numbers. Then look at the hundreds place.
Hundreds place of 6,918 is greater than the hundreds place of 6,818.
So, 6,918 > 6,818.
Therefore 6,918 greater than 6,818.
b. 49,917 ____ 49,907
Answer:
Here ten thousands, thousands and hundreds place is same in both numbers then look at the tens place.
The tens place of 49,917 is greater than the tens place of 49,907.
So, 49,917 > 49,907.
Therefore 49,917 is greater than 49,907.
c. 3,425,556 ____ 3,524,565
Answer:
Here lakhs place of 3,425,556 is less than the lakhs place of 3,524,565.
So, 3,425,556 < 3,524,565.
Therefore 3,425,556 less than 3,524,565.
Question 17.
a. 8,724,100 ____ 5,724,101
Answer:
Ten lakhs place of 8,724,100 is greater than the ten lakhs place of 5,724,101.
So, 8,724,100 > 5,724,101.
Therefore 8,724,100 greater than 5,724,101.
b. 3,002,019 ____ 3,002,109
Answer:
Here hundreds place of 3,002,019 is less than the hundreds place of 3,002,109.
So, 3,002,019 < 3,002,109.
Therefore 3,002,019 less than 3,002,109
c. 2,418 ____ 5,418
Answer:
Here thousands place of 2,418 is less than the thousands place of 5,418.
So, 2,418 < 5,418.
Therefore 2,418 less than 5,418