Students can use the Spectrum Math Grade 3 Answer Key Chapter 2 Lesson 2.7 Addition and Subtraction Practice as a quick guide to resolve any of their doubts
Spectrum Math Grade 3 Chapter 2 Lesson 2.7 Addition and Subtraction Practice Answers Key
Add or Subtract.
Question 1.
a.
Answer:
Given numbers are 39 and 92
Let us add the digits in ones place first i.e. 9+2 = 11 and then move on to the tens place. If you get carry shift it to the digit on top of tens place. Adding these 2 addends we have the result as follows
b.
Answer:
Given numbers are 86 and 93
Let us add the digits in ones place first i.e. 6+3 = 9 and then move on to the tens place. Adding these 2 addends we have the result as follows
c.
Answer:
Given numbers are 132 and 41
First let us subtract the units or ones digit.
Subtract 1 from 2 which gives the value as 1.3 is less than 4 so we can’t subtract thus we will take borrow from tens place making it 12. So, 13 – 4 = 9. Therefore, the result as follows
d.
Answer:
Given numbers are 186 and 92
First let us subtract the units or ones digit.
Subtract 2 from 6 which gives the value as 4 . 8 is less than 9 so we can’t subtract thus we will take borrow from tens place making it 18. So, 18 – 9 = 9. Therefore, the result as follows
e.
Answer:
Given numbers are 543 and 121
Let us find the difference of units place. Thus we have 3-1 = 2. Proceeding further to tens and hundreds place we get the result as follows
f.
Answer:
Given numbers are 125 and 89
Let us add the digits in ones place first i.e. 5+9 = 14 and then move on to the tens place. If you get carry shift it to the digit on top of tens place. Adding these 2 addends we have the result as follows
Question 2.
a.
Answer:
Given numbers are 76 and 192
Let us add the digits in ones place first i.e. 6+2 = 8 and then move on to the tens place. If you get carry shift it to the digit on top of tens place. Adding these 2 addends we have the result as follows
b.
Answer:
Given numbers are 154 and 92
First let us subtract the units or ones digit.
Subtract 2 from 4 which gives the value as 2 . 5 is less than 9 so we can’t subtract thus we will take borrow from tens place making it 15. So, 15 – 9 = 6. Therefore, the result as follows
c.
Answer:
Given numbers are 543 and 206
Difference between 543 and 206 in each steps is explained below
d.
Answer:
Given numbers are 150 and 90
Subtracting the numbers in ones place we have 0-0 = 0.
Finding Difference of Tens Place digits we get as 15-9 = 6
e.
Answer:
Given numbers are 650 and 129
Let us add the digits in ones place first i.e. 0+9 = 9 and then move on to the tens place and hundreds place. Adding these 2 addends we have the result as follows
f.
Answer:
Given numbers are 920 and 860
Let us find the difference of units place. As 2 is less than 6 we need to take borrow from hundreds place thus making it 12. Thus we have 12 – 6 = 6. Proceeding further to hundreds place we get the result as follows
Question 3.
a.
Answer:
Given numbers are 137 and 310
Adding the given numbers starting from units digit and moving on to tens and hundreds place we have as below
b.
Answer:
Given numbers are 159 and 82
Let us find the difference of units place .Subtract 2 from 9 which gives the result as 7. As 5 is less than 8 we need to take borrow from hundreds place thus making it 15. Thus we have 15 – 8 = 7. Proceeding further to hundreds place we get the result as follows
c.
Answer:
Given numbers are 185 and 96
First let us subtract the units or ones digit. 5 is less than 6 so we can’t subtract thus we will take borrow from tens place making it 15. So, 15-6 = 9. Applying the same concept to tens place and hundreds place digit we have the result as follows
d.
Answer:
Given numbers are 432 and 257
First let us subtract the units or ones digit. 2 is less than 7 so we can’t subtract thus we will take borrow from tens place making it 12. So, 12-7 = 5. Applying the same concept to tens place and hundreds place digit we have the result as follows
e.
Answer:
Given numbers are 710 and 512
First let us subtract the units or ones digit. 0 is less than 2 so we can’t subtract thus we will take borrow from tens place making it 10. So, 10-2 = 8. Applying the same concept to tens place and hundreds place digit we have the result as follows
f.
Answer:
Given numbers are 819 and 720
Let us find the difference of units place. Subtract 0 from 9 which gives the result as 9. As 1 is less than 2 we need to take borrow from hundreds place thus making it 11. Thus we have 11 – 2 = 9. Proceeding further to hundreds place we get the result as follows
Question 4.
a.
Answer:
Adding numbers 541 and 862
Beginning with ones place and moving ahead to tens and hundreds place we get the result as follows
b.
Answer:
Given numbers are 432 and 119
First let us subtract the units or ones digit. 2 is less than 9 so we can’t subtract thus we will take borrow from tens place making it 12. So, 12-9 = 3. Applying the same concept to tens place and hundreds place digit we have the result as follows
c.
Answer:
Given numbers are 720 and 140
Let us add the digits in ones place first i.e. 0+0 = 0 and then move on to the tens place and hundreds place. Adding these 2 addends we have the result as follows
d.
Answer:
Given numbers are 186 and 107
First let us subtract the units or ones digit. 6 is less than 7 so we can’t subtract thus we will take borrow from tens place making it 16. So, 16-7 = 9. Applying the same concept to tens place and hundreds place digit we have the result as follows.
e.
Answer:
Given numbers are 432 and 119
First let us subtract the units or ones digit. 0 is less than 5 so we can’t subtract thus we will take borrow from tens place making it 10. So, 10-5 = 5. Applying the same concept to tens place and hundreds place digit we have the result as follows
f.
Answer:
Given numbers are 413 and 356
Let us add the digits in ones place first i.e. 3+6 = 9 and then move on to the tens place and hundreds place. Adding these 2 addends we have the result as follows
Question 5.
a.
Answer:
Given numbers are 812 and 93
Let us add the digits in ones place first i.e. 2+3 = 5 and then move on to the tens place and hundreds place. If you get carry shift it to the digit on top of tens place and in case of carry in tens place summation transfer it to hundreds place. Adding these 2 addends we have the result as follows
b.
Answer:
Given numbers are 712 and 347
First let us subtract the units or ones digit. 2 is less than 7 so we can’t subtract thus we will take borrow from tens place making it 12. So, 12-5 = 7. Applying the same concept to tens place and hundreds place digit we have the result as follows
c.
Answer:
Given numbers are 690 and 320
First let us subtract the units or ones digit. First subtract the number in ones place. Then Apple the same concept to tens place and hundreds place digit we have the result as follows
d.
Answer:
Given numbers are 451 and 253
First let us subtract the units or ones digit. 1 is less than 3 so we can’t subtract thus we will take borrow from tens place making it 11. So, 11-3 = 8. Applying the same concept to tens place and hundreds place digit we have the result as follows
e.
Answer:
Given numbers are 512 and 308
First let us subtract the units or ones digit. 2 is less than 8 so we can’t subtract thus we will take borrow from tens place making it 12. So, 12-8 = 4. Applying the same concept to tens place and hundreds place digit we have the result as follows
f.
Answer:
Given numbers are 803 and 112
Let us add the digits in ones place first i.e. 3+2 = 5 and then move on to the tens place. Adding these 2 addends we have the result as follows
Question 6.
a.
Answer:
Given numbers are 119 and 104
Let us add the digits in ones place first i.e. 9+4 = 13 and then move on to the tens place and hundreds place. If you get carry shift it to the digit on top of tens place and in case of carry in tens place summation transfer it to hundreds place. Adding these 2 addends we have the result as follows
b.
Answer:
Given numbers are 703 and 219
Let us add the digits in ones place first i.e. 3+9 = 12 and then move on to the tens place and hundreds place. If you get carry shift it to the digit on top of tens place and in case of carry in tens place summation transfer it to hundreds place. Adding these 2 addends we have the result as follows
c.
Answer:
Given numbers are 861 and 172
First let us subtract the units or ones digit. 1 is less than 2 so we can’t subtract thus we will take borrow from tens place making it 11. So, 11-2 = 9. Applying the same concept to tens place and hundreds place digit we have the result as follows
d.
Answer:
Given numbers are 186 and 210
Let us add the digits in ones place first i.e. 6+0 = 6 and then move on to the tens place and hundreds place. Adding these 2 addends we have the result as follows
e.
Answer:
Given numbers are 513 and 211
First let us subtract the units or ones digit. subtract 1 from 3 the result obtained is 2 and proceeding the same process for tens and hundreds place we have the result as follows
f.
Answer:
Given numbers are 179 and 86
First let us subtract the units or ones digit. when 6 is subtracted from 9 the result is obtained as 3.7 is less than 8 so we can’t subtract from 7 thus we will take borrow from hundreds place making it 17. So, 17-8 = 9. we have the result as follows
Question 7.
a.
Answer:
Given numbers are 120 and 45
First let us subtract the units or ones digit. Since we can’t subtract 5 from 0 thus we will take borrow from tens place making it 10. So, 10-5 = 5. Applying the same concept to the tens and hundreds place digit we have the result as follows
b.
Answer:
Given numbers are 198 and 79
First let us subtract the units or ones digit. since we can’t subtract 9 from 8 thus we will take borrow from tens place making it 17. So, 18-9 = 9. Applying the same concept to the tens and hundreds place digit we have the result as follows
c.
Answer:
Given numbers are 312 and 192
First let us subtract the units or ones digit. when 2 is subtracted from 2 the result is obtained as 0. 1 is less than 9 so we can’t subtract 9 from 1 thus we will take borrow from hundreds place making it 11. So, 11- 9 = 2. we have the result as follows
d.
Answer:
Given numbers are 519 and 130
Let us add the digits in ones place first i.e. 5+0 = 5 and then move on to the tens place and hundreds place. Adding these 2 addends we have the result as follows
e.
Answer:
Given numbers are 710 and 195
Let us add the digits in ones place first i.e. 0+5 = 5 and then move on to the tens place and If you get carry shift it to the digit on top of tens place shift to the hundreds place. Adding these 2 addends we have the result as follows
f.
Answer:
Given numbers are 712 and 419
First let us subtract the units or ones digit. since we can’t subtract 9 from 2 thus we will take borrow from tens place making it 12. So, 12-9 = 3. Applying the same concept to the tens and hundreds place digit we have the result as follows
Question 8.
a.
Answer:
Given numbers are 412 and 306
First let us subtract the units or ones digit. since we can’t subtract 6 from 2 thus we will take borrow from tens place making it 12. So, 12-6 = 6. Applying the same concept to the tens and hundreds place digit we have the result as follows
b.
Answer:
Given numbers are 790 and 205
First let us subtract the units or ones digit. since we can’t subtract 5 from 0 thus we will take borrow from tens place making it 10. So, 10-5 = 5 . Applying the same concept to the tens and hundreds place digit we have the result as follows
c.
Answer:
Given numbers are 157 and 192
Let us add the digits in ones place first i.e. 7+2 = 9 and then move on to the tens place and hundreds place. If you get any carry in tens place summation transfer it to hundreds place. Adding these 2 addends we have the result as follows
d.
Answer:
Given numbers are 175 and 84
First let us subtract the units or ones digit. when 4 is subtracted from 5 the result is obtained as 1. 7 is less than 8 so we can’t subtract thus we will take borrow from tens place making it 17 So, 17- 8 = 9. Applying the same concept to the hundreds place digit we have the result as follows
e.
Answer:
Given numbers are 192 and 210
Let us add the digits in ones place first i.e. 2+0 = 2 and then move on to the tens place and hundreds place. If you get carry shift it to the digit on top of tens place and in case of carry in tens place summation transfer it to hundreds place. Adding these 2 addends we have the result as follows
f.
Answer:
Given numbers are 786 and 442
First let us subtract the units or ones digit. when 2 is subtracted from 6 the result is obtained as 4. Applying the same concept to the tens and hundreds place digit we have the result as follows
Question 9.
a.
Answer:
Given numbers are 786 and 442
First let us subtract the units or ones digit. when 2 is subtracted from 6 the result is obtained as 4. Applying the same concept to the tens and hundreds place digit we have the result as follows
b.
Answer:
Given numbers are 674 and 556
First let us subtract the units or ones digit. since we can’t subtract 6 from 4 thus we will take borrow from tens place making it 14. So, 14-6 = 8 . Applying the same concept to the tens and hundreds place digit we have the result as follows
c.
Answer:
Given numbers are 700 and 310
First let us subtract the units or ones digit. when 0 is subtracted from 0 the result is obtained as 0. 0 is less than 1 so we can’t subtract thus we will take borrow from tens place making it 10. So, 10-1 =9. Applying the same concept to the hundreds place digit we have the result as follows
d.
Answer:
Given numbers are 120 and 460
Let us add the digits in ones place first i.e. 0+0 = 0 and then move on to the tens place and hundreds place. Adding these 2 addends we have the result as follows
e.
Answer:
Given numbers are 690 and 541
First let us subtract the units or ones digit. since we can’t subtract 0 from 1 thus we will take borrow from tens place making it 10. So, 10-1 = 9. Applying the same concept to the tens and hundreds place digit we have the result as follows
f.
Answer:
Given numbers are 674 and 556
First let us subtract the units or ones digit. since we can’t subtract thus we will take borrow from tens place making it 10. So, 10-2 = 8 . Applying the same concept to the tens and hundreds place digit we have the result as follows
