Students can use the Spectrum Math Grade 3 Answer Key Chapter 1 Lesson 1.7 Adding Three Numbers as a quick guide to resolve any of their doubts
Spectrum Math Grade 3 Chapter 1 Lesson 1.7 Adding Three Numbers Answers Key
Add.
Question 1.
a.
Answer:
Explanation:
First, we need to add the digits in one’s place. So, we need to add 3, 6 and 5 which are in one’s place. Adding 3, 6 and 5 gives the sum as 14 which can be renamed as 10 + 4. So, 4 will be placed in the one’s digit in the answer 1 will be carry forwarded to get added with the numbers in ten’s place. So, adding digits in tens place which are 1, 2 and 4 along with the carry forwarded digit 1 will give sum as 8. So, 8 should be written in ten’s place in the answer. Finally, the sum of given three numbers is 84.
b.
Answer:
Explanation:
First, we need to add the digits in one’s place. So, we need to add 7, 9 and 6 which are in one’s place. Adding 7, 9 and 6 gives the sum as 22 which can be renamed as 20 + 2. So, 2 will be placed in the one’s digit in the answer and 2 will be carry forwarded to get added with the numbers in ten’s place. So, adding digits in tens place which are 2 and 5 along with the carry forwarded digit 2 will give sum as 9. So, 9 should be written in ten’s place in the answer. Finally, the sum of given three numbers is 92.
c.
Answer:
Explanation:
First, we need to add the digits in one’s place. So, we need to add 6, 3 and 5 which are in one’s place. Adding 6, 3 and 5 gives the sum as 14 which can be renamed as 10 + 4. So, 4 will be placed in the one’s digit in the answer 1 will be carry forwarded to get added with the numbers in ten’s place. So, adding digits in tens place which are 1, 2 and 2 along with the carry forwarded digit 1 will give sum as 6. So, 6 should be written in ten’s place in the answer. Finally, the sum of given three numbers is 64.
d.
Answer:
Explanation:
First, we need to add the digits in one’s place. So, we need to add 7, 7 and 4 which are in one’s place. Adding 7, 7 and 4 gives the sum as 18 which can be renamed as 10 + 8. So, 8 will be placed in the one’s digit in the answer 1 will be carry forwarded to get added with the numbers in ten’s place. So, adding digits in tens place which are 2 and 3 along with the carry forwarded digit 1 will give sum as 6. So, 6 should be written in ten’s place in the answer. Finally, the sum of given three numbers is 68.
e.
Answer:
Explanation:
First, we need to add the digits in one’s place. So, we need to add 6, 3 and 9 which are in one’s place. Adding 6, 3 and 9 gives the sum as 18 which can be renamed as 10 + 8. So, 8 will be placed in the one’s digit in the answer 1 will be carry forwarded to get added with the numbers in ten’s place. So, adding digits in tens place which are 1 and 2 along with the carry forwarded digit 1 will give sum as 4. So, 4 should be written in ten’s place in the answer. Finally, the sum of given three numbers is 48.
f.
Answer:
Explanation:
First, we need to add the digits in one’s place. So, we need to add 0, 0 and 0 which are in one’s place. Adding 0, 0 and 0 gives the sum as 0. So, 0 will be placed in the one’s digit in the answer. So, adding digits in tens place which are 1, 3 and 5 will give sum as 9. So, 9 should be written in ten’s place in the answer. Finally, the sum of given three numbers is 90.
Question 2.
a.
Answer:
Explanation:
First, we need to add the digits in one’s place. So, we need to add 2, 1 and 5 which are in one’s place. Adding 2, 1 and 5 gives the sum as 8. So, 8 will be placed in the one’s digit in the answer. So, adding digits in tens place which are 2, 3 and 4 will give sum as 9. So, 9 should be written in ten’s place in the answer. Finally, the sum of given three numbers is 98.
b.
Answer:
Explanation:
First, we need to add the digits in one’s place. So, we need to add 9, 1 and 2 which are in one’s place. Adding 9, 1 and 2 gives the sum as 12 which can be renamed as 10 + 2. So, 2 will be placed in the one’s digit in the answer 1 will be carry forwarded to get added with the numbers in ten’s place. So, adding digits in tens place which are 1, 2 and 3 along with the carry forwarded digit 1 will give sum as 7. So, 7 should be written in ten’s place in the answer. Finally, the sum of given three numbers is 72.
c.
Answer:
Explanation:
First, we need to add the digits in one’s place. So, we need to add 3, 6 and 5 which are in one’s place. Adding 9, 6 and 5 gives the sum as 20 which can be renamed as 20 + 0. So, 0 will be placed in the one’s digit in the answer 2 will be carry forwarded to get added with the numbers in ten’s place. So, adding digits in tens place which are 2, 1 and 1 along with the carry forwarded digit 2 will give sum as 6. So, 6 should be written in ten’s place in the answer. Finally, the sum of given three numbers is 60.
d.
Answer:
Explanation:
First, we need to add the digits in one’s place. So, we need to add 3, 5 and 5 which are in one’s place. Adding 3, 5 and 5 gives the sum as 13 which can be renamed as 10 + 3. So, 3 will be placed in the one’s digit in the answer 1 will be carry forwarded to get added with the numbers in ten’s place. So, adding digits in tens place which are 1, 1 and 2 along with the carry forwarded digit 1 will give sum as 5. So, 5 should be written in ten’s place in the answer. Finally, the sum of given three numbers is 53.
e.
Answer:
Explanation:
First, we need to add the digits in one’s place. So, we need to add 2, 1 and 8 which are in one’s place. Adding 2, 1 and 8 gives the sum as 11 which can be renamed as 10 + 1. So, 1 will be placed in the one’s digit in the answer 1 will be carry forwarded to get added with the numbers in ten’s place. So, adding digits in tens place which are 4 and 2 along with the carry forwarded digit 1 will give sum as 7. So, 7 should be written in ten’s place in the answer. Finally, the sum of given three numbers is 71.
f.
Answer:
Explanation:
First, we need to add the digits in one’s place. So, we need to add 6, 3 and 5 which are in one’s place. Adding 6, 3 and 5 gives the sum as 14 which can be renamed as 10 + 4. So, 4 will be placed in the one’s digit in the answer 1 will be carry forwarded to get added with the numbers in ten’s place. So, adding digits in tens place which are 2, 2 and 3 along with the carry forwarded digit 1 will give sum as 8. So, 8 should be written in ten’s place in the answer. Finally, the sum of given three numbers is 84.
Question 3.
a.
Answer:
Explanation:
First, we need to add the digits in one’s place. So, we need to add 1, 0 and 2 which are in one’s place. Adding 1, 0 and 2 gives the sum as 3. So, 3 will be placed in the one’s digit in the answer. So, adding digits in tens place which are 1, 3 and 4 will give sum as 8. So, 8 should be written in ten’s place in the answer. Finally, the sum of given three numbers is 83.
b.
Answer:
Explanation:
First, we need to add the digits in one’s place. So, we need to add 7, 6 and 9 which are in one’s place. Adding 7, 6 and 9 gives the sum as 22 which can be renamed as 20 + 2. So, 2 will be placed in the one’s digit in the answer 2 will be carry forwarded to get added with the numbers in ten’s place. So, adding digits in tens place which are 2 and 1 along with the carry forwarded digit 2 will give sum as 5. So, 5 should be written in ten’s place in the answer. Finally, the sum of given three numbers is 52.
c.
Answer:
Explanation:
First, we need to add the digits in one’s place. So, we need to add 4, 7 and 8 which are in one’s place. Adding 4, 7 and 8 gives the sum as 19. Finally, the sum of given three numbers is 19.
d.
Answer:
Explanation:
First, we need to add the digits in one’s place. So, we need to add 4, 6 and 1 which are in one’s place. Adding 4, 6 and 1 gives the sum as 11 which can be renamed as 10 + 1. So, 1 will be placed in the one’s digit in the answer 1 will be carry forwarded to get added with the numbers in ten’s place. So, adding digits in tens place which are 3, 1 and 4 along with the carry forwarded digit 1 will give sum as 9. So, 9 should be written in ten’s place in the answer. Finally, the sum of given three numbers is 91.
e.
Answer:
Explanation:
First, we need to add the digits in one’s place. So, we need to add 6, 3 and 5 which are in one’s place. Adding 6, 3 and 5 gives the sum as 14 which can be renamed as 10 + 4. So, 4 will be placed in the one’s digit in the answer 1 will be carry forwarded to get added with the numbers in ten’s place. So, adding digits in tens place which are 1, 2 and 3 along with the carry forwarded digit 1 will give sum as 7. So, 7 should be written in ten’s place in the answer. Finally, the sum of given three numbers is 74.
f.
Answer:
Explanation:
First, we need to add the digits in one’s place. So, we need to add 9, 1 and 5 which are in one’s place. Adding 9, 1 and 5 gives the sum as 15 which can be renamed as 10 + 5. So, 5 will be placed in the one’s digit in the answer 1 will be carry forwarded to get added with the numbers in ten’s place. So, adding digits in tens place which are 2, 3 and 2 along with the carry forwarded digit 1 will give sum as 8. So, 8 should be written in ten’s place in the answer. Finally, the sum of given three numbers is 85.
Question 4.
a.
Answer:
Explanation:
First, we need to add the digits in one’s place. So, we need to add 2, 5 and 9 which are in one’s place. Adding 2, 5 and 9 gives the sum as 16 which can be renamed as 10 + 6. So, 6 will be placed in the one’s digit in the answer 1 will be carry forwarded to get added with the numbers in ten’s place. So, adding digits in tens place which is 8 along with the carry forwarded digit 1 will give sum as 9. So, 9 should be written in ten’s place in the answer. Finally, the sum of given three numbers is 96.
b.
Answer:
Explanation:
First, we need to add the digits in one’s place. So, we need to add 3, 7 and 2 which are in one’s place. Adding 3, 7 and 2 gives the sum as 12 which can be renamed as 10 + 2. So, 2 will be placed in the one’s digit in the answer 1 will be carry forwarded to get added with the numbers in ten’s place. So, adding digits in tens place which are 3, 4 and 1 along with the carry forwarded digit 1 will give sum as 9. So, 9 should be written in ten’s place in the answer. Finally, the sum of given three numbers is 92.
c.
Answer:
Explanation:
First, we need to add the digits in one’s place. So, we need to add 6, 5 and 2 which are in one’s place. Adding 6, 5 and 2 gives the sum as 13 which can be renamed as 10 + 3. So, 3 will be placed in the one’s digit in the answer 1 will be carry forwarded to get added with the numbers in ten’s place. So, adding digits in tens place which is 8 along with the carry forwarded digit 1 will give sum as 9. So, 9 should be written in ten’s place in the answer. Finally, the sum of given three numbers is 93.
d.
Answer:
Explanation:
First, we need to add the digits in one’s place. So, we need to add 8, 2 and 6 which are in one’s place. Adding 8, 2 and 6 gives the sum as 16 which can be renamed as 10 + 6. So, 6 will be placed in the one’s digit in the answer 1 will be carry forwarded to get added with the numbers in ten’s place. So, adding digits in tens place which are 1, 3 and 1 along with the carry forwarded digit 1 will give sum as 6. So, 6 should be written in ten’s place in the answer. Finally, the sum of given three numbers is 66.
e.
Answer:
Explanation:
First, we need to add the digits in one’s place. So, we need to add 6, 9 and 6 which are in one’s place. Adding 6, 9 and 6 gives the sum as 21 which can be renamed as 20 + 1. So, 1 will be placed in the one’s digit in the answer 2 will be carry forwarded to get added with the numbers in ten’s place. So, adding digits in tens place which are 4, 2 and 1 along with the carry forwarded digit 2 will give sum as 9. So, 9 should be written in ten’s place in the answer. Finally, the sum of given three numbers is 91.
f.
Answer:
Explanation:
First, we need to add the digits in one’s place. So, we need to add 3, 1 and 5 which are in one’s place. Adding 3, 1 and 5 gives the sum as 9. So, 9 will be placed in the one’s digit in the answer. So, adding digits in tens place which are 5, 2 and 1 will give sum as 8. So, 8 should be written in ten’s place in the answer. Finally, the sum of given three numbers is 89.
Question 5.
a.
Answer:
Explanation:
First, we need to add the digits in one’s place. So, we need to add 6, 1 and 8 which are in one’s place. Adding 6, 1 and 8 gives the sum as 15 which can be renamed as 10 + 5. So, 5 will be placed in the one’s digit in the answer 1 will be carry forwarded to get added with the numbers in ten’s place. So, adding digits in tens place which are 6 and 2 along with the carry forwarded digit 1 will give sum as 9. So, 9 should be written in ten’s place in the answer. Finally, the sum of given three numbers is 95.
b.
Answer:
Explanation:
First, we need to add the digits in one’s place. So, we need to add 7, 3 and 8 which are in one’s place. Adding 7, 3 and 8 gives the sum as 18 which can be renamed as 10 + 8. So, 8 will be placed in the one’s digit in the answer 1 will be carry forwarded to get added with the numbers in ten’s place. So, adding digits in tens place which are 4 and 1 along with the carry forwarded digit 1 will give sum as 6. So, 6 should be written in ten’s place in the answer. Finally, the sum of given three numbers is 68.
c.
Answer:
Explanation:
First, we need to add the digits in one’s place. So, we need to add 2, 1 and 8 which are in one’s place. Adding 2, 1 and 8 gives the sum as 11 which can be renamed as 10 + 1. So, 1 will be placed in the one’s digit in the answer 1 will be carry forwarded to get added with the numbers in ten’s place. So, adding digits in tens place which are 2, 4 and 2 along with the carry forwarded digit 1 will give sum as 9. So, 9 should be written in ten’s place in the answer. Finally, the sum of given three numbers is 91.
d.
Answer:
Explanation:
First, we need to add the digits in one’s place. So, we need to add 3, 5 and 7 which are in one’s place. Adding 3, 5 and 7 gives the sum as 15 which can be renamed as 10 + 5. So, 5 will be placed in the one’s digit in the answer 1 will be carry forwarded to get added with the numbers in ten’s place. So, adding digits in tens place which are 2, 1 and 1 along with the carry forwarded digit 1 will give sum as 5. So, 5 should be written in ten’s place in the answer. Finally, the sum of given three numbers is 55.
e.
Answer:
Explanation:
First, we need to add the digits in one’s place. So, we need to add 8, 6 and 4 which are in one’s place. Adding 8, 6 and 4 gives the sum as 18 which can be renamed as 10 + 8. So, 8 will be placed in the one’s digit in the answer 1 will be carry forwarded to get added with the numbers in ten’s place. So, adding digits in tens place which are 1, 1 and 2 along with the carry forwarded digit 1 will give sum as 5. So, 5 should be written in ten’s place in the answer. Finally, the sum of given three numbers is 58.
f.
Answer:
Explanation:
First, we need to add the digits in one’s place. So, we need to add 3, 5 and 7 which are in one’s place. Adding 3, 5 and 7 gives the sum as 15 which can be renamed as 10 + 5. So, 5 will be placed in the one’s digit in the answer 1 will be carry forwarded to get added with the numbers in ten’s place. So, adding digits in tens place which are 2, 3 and 1 along with the carry forwarded digit 1 will give sum as 7. So, 7 should be written in ten’s place in the answer. Finally, the sum of given three numbers is 75.