This handy Spectrum Math Grade 4 Answer Key Chapter 3 Lesson 3.1 Adding 3-Digit Numbers provides detailed answers for the workbook questions.
Spectrum Math Grade 4 Chapter 3 Lesson 3.1 Adding 3-Digit Numbers Answers Key
Add the ones.
Add the tens.
Add the hundreds.
Add.
Question 1.
a.
Answer:
Explanation:
Add the ones:
By adding 7 and 2 we get 9
Add the tens:
By adding 2 and 8 we get 10 and 1 will be carried to the hundreds place.
Add the hundreds:
By adding 7, 1 and 1 we get 9.
So, the sum of 727 and 182 is 909.
b.
Answer:
Explanation:
Add the ones:
By adding 7 and 3 we get 10
Add the tens:
By adding 1 and 4 we get 5.
Add the hundreds:
By adding 5 and 2 we get 7.
c.
Answer:
Explanation:
Add the ones:
By adding 2 and 7 we get 9.
Add the tens:
By adding 0 and 8 we get 8.
Add the hundreds:
By adding 4 and 1 we get 5.
d.
Answer:
Explanation:
Add the ones:
By adding 2 and 7 we get 9.
Add the tens:
By adding 2 and 3 we get 5.
Add the hundreds:
By adding 1 and 1 we get 2.
e.
Answer:
Explanation:
Add the ones:
By adding 3 and 5 we get 8.
Add the tens:
By adding 6 and 2 we get 8.
Add the hundreds:
By adding 6 and 1 we get 7.
f.
Answer:
Explanation:
Add the ones:
By adding 3 and 0 we get 3.
Add the tens:
By adding 2 and 7 we get 9.
Add the hundreds:
By adding 8 and 1 we get 9.
Question 2.
a.
Answer:
Explanation:
Add the ones:
By adding 7 and 4 we get 11.
Add the tens:
By adding 3 and 2 we get 5.
5 + 1 = 6
Add the hundreds:
By adding 3 and 2 we get 5.
b.
Answer:
Explanation:
Add the ones:
By adding 1 and 7 we get 8.
Add the tens:
By adding 8 and 2 we get 10.
Add the hundreds:
By adding 3 and 1 we get 4.
c.
Answer:
Explanation:
Add the ones:
By adding 7 and 3 we get 10.
Add the tens:
By adding 1 and 1 we get 2.
Add the hundreds:
By adding 4 and 3 we get 7.
d.
Answer:
Explanation:
Add the ones:
By adding 7 and 3 we get 10.
Add the tens:
By adding 1, 5 and 2 we get 8.
Add the hundreds:
By adding 5 and 2 we get 7.
e.
Answer:
Explanation:
Add the ones:
By adding 7 and 1 we get 8.
Add the tens:
By adding 8 and 1 we get 9.
Add the hundreds:
By adding 4 and 1 we get 5.
f.
Answer:
Explanation:
Add the ones:
By adding 3 and 2 we get 5.
Add the tens:
Add the hundreds:
By adding 7 and 4 we get 11.
Question 3.
a.
Answer:
Explanation:
Add the ones:
By adding 4 and 9 we get 13.
Add the tens:
By adding 1 and 7 we get 8.
Add the hundreds:
By adding 8 and 1 we get 9.
b.
Answer:
Explanation:
Add the ones:
By adding 8 and 8 we get 16.
Add the tens:
By adding 1, 9 and 9 we get 19.
Add the hundreds:
By adding 1, 1 and 1 we get 3.
c.
Answer:
Explanation:
Add the ones:
By adding 4 and 8 we get 12.
Add the tens:
By adding 1, 7 and 9 we get 17.
Add the hundreds:
By adding 1, 3 and 2 we get 6.
d.
Answer:
Explanation:
Add the ones:
By adding 3 and 7 we get 10.
Add the tens:
By adding 1 and 0 we get 1.
Add the hundreds:
By adding 5 and 3 we get 8.
e.
Answer:
Explanation:
Add the ones:
By adding 3 and 4 we get 7.
Add the tens:
By adding 1 and 4 we get 5.
Add the hundreds:
By adding 3 and 4 we get 7.
f.
Answer:
Explanation:
Add the ones:
By adding 3 and 7 we get 10.
Add the tens:
By adding 3 and 7 we get 10.
Add the hundreds:
By adding 1, 7 and 1 we get 9.
Question 4.
a.
Answer:
Explanation:
Add the ones:
By adding 2 and 8 we get 10.
Add the tens:
By adding 5 and 3 we get 8.
Add the hundreds:
By adding 6 and 3 we get 9.
b.
Answer:
Explanation:
Add the ones:
By adding 8 and 3 we get 11.
Add the tens:
By adding 1, 9 and 3 we get 13.
Add the hundreds:
By adding 1, 2 and 1 we get 4.
c.
Answer:
Explanation:
Add the ones:
By adding 1 and 7 we get 8.
Add the tens:
By adding 1 and 4 we get 5.
Add the hundreds:
By adding 5 and 3 we get 8.
d.
Answer:
Explanation:
Add the ones:
By adding 4 and 6 we get 10.
Add the tens:
By adding 1, 3 and 3 we get 7.
Add the hundreds:
By adding 7 and 5 we get 12.
e.
Answer:
Explanation:
Add the ones:
By adding 9 and 3 we get 12.
Add the tens:
By adding 0 and 1 we get 1.
Add the hundreds:
By adding 3 and 4 we get 7.
f.
Answer:
Explanation:
Add the ones:
By adding 8 and 1 we get 9.
Add the tens:
By adding 3 and 7 we get 10.
10 + 1 = 11
Add the hundreds:
By adding 1, 1 and 1 we get 3.
Question 5.
a.
Answer:
Explanation:
Add the ones:
By adding 3 and 6 we get 9.
Add the tens:
By adding 5 and 3 we get 8.
Add the hundreds:
By adding 1 and 7 we get 8.
b.
Answer:
Explanation:
Add the ones:
By adding 3 and 3 we get 6.
Add the tens:
By adding 4 and 2 we get 6.
Add the hundreds:
By adding 5 and 1 we get 6.
c.
Answer:
Explanation:
Add the ones:
By adding 7 and 6 we get 13.
Add the tens:
By adding 1, 1 and 2 we get 4.
Add the hundreds:
By adding 3 and 2 we get 5.
d.
Answer:
Explanation:
Add the ones:
By adding 9 and 8 we get 17.
Add the tens:
By adding 9 and 9 we get 18.
Add the hundreds:
By adding 1, 1 and 1 we get 3.
e.
Answer:
Explanation:
Add the ones:
By adding 4 and 6 we get 10.
Add the tens:
By adding 1 and 9 we get 10.
Add the hundreds:
By adding 1, 9 and 3 we get 13
f.
Answer:
Explanation:
Add the ones:
By adding 5 and 5 we get 10.
Add the tens:
By adding 1, 2 and 2 we get 5.
Add the hundreds:
By adding 8 and 1 we get 9.
Question 6.
a.
Answer:
Explanation:
Add the ones:
By adding 2 and 2 we get 4.
Add the tens:
By adding 0 and 1 we get 1.
Add the hundreds:
By adding 9 and 1 we get 10.
b.
Answer:
Explanation:
Add the ones:
By adding 3 and 4 we get 7.
Add the tens:
By adding 8 and 7 we get 15.
Add the hundreds:
By adding 1, 2 and 1 we get 4.
c.
Answer:
Explanation:
Add the ones:
By adding 0 and 0 we get 0.
Add the tens:
By adding 1 and 3 we get 4.
Add the hundreds:
By adding 3 and 6 we get 9.
d.
Answer:
Explanation:
Add the ones:
By adding 8 and 6 we get 14.
Add the tens:
By adding 5 and 3 we get 8.
Add the hundreds:
By adding 1 and 4 we get 5.
e.
Answer:
Explanation:
Add the ones:
By adding 9 and 8 we get 17.
Add the tens:
By adding 1 and 4 we get 5.
Add the hundreds:
By adding 1 and 7 we get 8.
f.
Answer:
Explanation:
Add the ones:
By adding 8 and 5 we get 13.
Add the tens:
By adding 1, 3 and 2 we get 6.
Add the hundreds:
By adding 1 and 1 we get 2.
Question 7.
a.
Answer:
Explanation:
Add the ones:
By adding 0 and 3 we get 3.
Add the tens:
By adding 0 and 9 we get 9.
Add the hundreds:
By adding 7 and 4 we get 11.
b.
Answer:
Explanation:
Add the ones:
By adding 9 and 9 we get 18.
Add the tens:
By adding 1 and 0 we get .1
Add the hundreds:
By adding 5 and 4 we get 9.
c.
Answer:
Explanation:
Add the ones:
By adding 2 and 8 we get 10.
Add the tens:
By adding 2 and 8 we get 10.
Add the hundreds:
By adding 2 and 8 we get 10.
d.
Answer:
Explanation:
Add the ones:
By adding 3 and 4 we get 7.
Add the tens:
By adding 9 and 0 we get 9.
Add the hundreds:
By adding 2 and 1 we get 3.
e.
Answer:
Explanation:
Add the ones:
By adding 3 and 6 we get 9.
Add the tens:
By adding 5 and 4 we get 9.
Add the hundreds:
By adding 9 and 1 we get 10.
f.
Answer:
Explanation:
Add the ones:
By adding 8 and 9 we get 17
Add the tens:
By adding 1 and 4 we get 5.
Add the hundreds:
By adding 2 and 1 we get 3.