Practice with the help of **Spectrum Math Grade 1 Answer Key Chapter 1 Lesson 1.18**** Addition Practice Through 10** regularly and improve your accuracy in solving questions.

## Spectrum Math Grade 1 Chapter 1 Lesson 1.18 Addition Practice Through 10 Answers Key

**Add.**

**1.**

Answer:

Addition:

Explanation:

3 + 5 = 8.

=> Three plus five equals eight.

**2.**

Answer:

Addition:

Explanation:

1 + 8 = 9.

=> One plus eight equals nine.

**3.**

Answer:

Addition:

Explanation:

7 + 2 = 9.

=> Seven plus two equals nine.

**4.**

Answer:

Addition:

Explanation:

4 + 6 = 10.

=> Four plus six equals ten.

**5.**

Answer:

Addition:

Explanation:

4 + 2 = 6.

=> Four plus two equals six.

**6.**

Answer:

Addition:

Explanation:

2 + 5 = 7.

=> Two plus five equals seven.

**7.**

Answer:

Addition:

Explanation:

4 + 5 = 9.

=> Four plus five equals nine.

**8.**

Answer:

Addition:

Explanation:

3 + 4 = 5.

=> Three plus four equals five.

**9.**

Answer:

Addition:

Explanation:

9 + 1 = 10.

=> Nine plus one equals ten.

**10.**

Answer:

Addition:

Explanation:

0 + 10 = 10.

=> Zero plus ten equals ten.

**11.**

Answer:

Addition:

Explanation:

6 + 3 = 9.

=> Six plus three equals nine.

**12.**

Answer:

Addition:

Explanation:

3 + 7 = 10.

=> Three plus seven equals ten.

**13.**

Answer:

Addition:

Explanation:

8 + 0 = 8.

=> Eight plus zero equals eight.

**14.**

Answer:

Addition:

Explanation:

3 + 2 = 5.

=> Three plus two equals five.

**15.**

Answer:

Addition:

Explanation:

0 + 7 = 7.

=> Zero plus seven equals seven.

**16.**

Answer:

Addition:

Explanation:

6 + 2 = 8.

=> Six plus two equals eight.

**17.**

Answer:

Addition:

Explanation:

7 + 3 = 10.

=> Seven plus three equals ten.

**18.**

Answer:

Addition:

Explanation:

0 + 9 = 9.

=> Zero plus nine equals nine.

**19.**

Answer:

Addition:

Explanation:

6 + 1 = 7.

=> Six plus one equals seven.

**20.**

Answer:

Addition:

Explanation:

5 + 2 = 7.

=> Five plus two equals seven.

**21.**

Answer:

Addition:

Explanation:

8 + 2 = 10.

=> Eight plus two equals ten.

**22.**

Answer:

Addition:

Explanation:

5 + 5 = 10.

=> Five plus five equals ten.

**23.**

Answer:

Addition:

Explanation:

4 + 0 = 4.

=> Four plus zero equals four.

**24.**

Answer:

Addition:

Explanation:

2 + 7 = 9.

=> Two plus seven equals nine.

**25.**

Answer:

Addition:

Explanation:

9 + 0 = 9.

=> Nine plus zero equals nine.

**26.**

Answer:

Addition:

Explanation:

6 + 4 = 10.

=> Six plus four equals ten.

**27.**

Answer:

Addition:

Explanation:

1 + 6 = 7.

=> One plus six equals seven.

**28.**

Answer:

Addition:

Explanation:

3 + 0 = 3.

=> Three plus zero equals three.

**29.**

Answer:

Addition:

Explanation:

2 + 8 = 10.

=> Two plus eight equals ten.

**30.**

Answer:

Addition:

Explanation:

5 + 3 = 8.

=> Five plus three equals eight.

**31.**

Answer:

Addition:

Explanation:

5 + 4 = 9.

=> Five plus four equals nine.

**32.**

Answer:

Addition:

Explanation:

2 + 4 = 6.

=> Two plus four equals six.

**33.**

Answer:

Addition:

Explanation:

7 + 0 = 7.

=> Seven plus zero equals seven.

**34.**

Answer:

Answer:

Addition:

Explanation:

8 + 1 = 9.

=> Eight plus one equals nine.

**35.**

Answer:

Answer:

Addition:

Explanation:

10 + 0 = 10.

=> Ten plus zero equals ten.

**36.**

Answer:

Answer:

Addition:

Explanation:

1 + 2 = 3.

=> One plus two equals three.

**Solve each problem.**

**37.** There are 8

There are 2

What is the sum? __10__

Answer:

Total number of carriers there = 10.

Explanation:

Number of carriers there = 8.

Number of carriers more there = 2.

Total number of carriers there = Number of carriers there + Number of carriers more there

= 8 + 2

= 10.

**38.** There are 6

3 more come.

What is 6 plus 3? _________

Answer:

Total number of hippos there = 9.

6 plus 3 equals 9.

Explanation:

Number of hippos there = 6.

Number of hippos more came = 3.

Total number of hippos there = Number of hippos there + Number of hippos more came

= 6 + 3

= 9.

**39.** I have 4

I buy 4 more

How many do I have now? ______

Answer:

Total number of pens I have = 8.

Explanation:

Number of pens I have = 4.

Number of pens I bought more = 4.

Total number of pens I have = Number of pens I have + Number of pens I bought more

= 4 + 4

= 8.

**40.** Ivan has 2

Helen has 5

What is 2 + 5? ______

Answer:

Total number of dolls Ivan and Helen has = 7.

2 + 5 = 7.

Explanation:

Number of dolls Ivan has = 2.

Number of dolls Helen has = 5.

Total number of dolls Ivan and Helen has = Number of dolls Ivan has + Number of dolls Helen has

= 2 + 5

= 7.

**41.** There are 7

3 more come.

How many in all? _______

Answer:

Total number of crows in all = 10.

Explanation:

Number of crows there = 7.

Number of crows came more = 3.

Total number of crows in all = Number of crows there + Number of crows came more

= 7 + 3

= 10.