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.

1.  Explanation:
3 + 5 = 8.
=> Three plus five equals eight.

2.  Explanation:
1 + 8 = 9.
=> One plus eight equals nine.

3.  Explanation:
7 + 2 = 9.
=> Seven plus two equals nine.

4.  Explanation:
4 + 6 = 10.
=> Four plus six equals ten.

5.  Explanation:
4 + 2 = 6.
=> Four plus two equals six.

6.  Explanation:
2 + 5 = 7.
=> Two plus five equals seven.

7.  Explanation:
4 + 5 = 9.
=> Four plus five equals nine.

8.  Explanation:
3 + 4 = 5.
=> Three plus four equals five.

9.  Explanation:
9 + 1 = 10.
=> Nine plus one equals ten.

10.  Explanation:
0 + 10 = 10.
=> Zero plus ten equals ten.

11.  Explanation:
6 + 3 = 9.
=> Six plus three equals nine.

12.  Explanation:
3 + 7 = 10.
=> Three plus seven equals ten.

13.  Explanation:
8 + 0 = 8.
=> Eight plus zero equals eight.

14.  Explanation:
3 + 2 = 5.
=> Three plus two equals five.

15.  Explanation:
0 + 7 = 7.
=> Zero plus seven equals seven.

16.  Explanation:
6 + 2 = 8.
=> Six plus two equals eight.

17.  Explanation:
7 + 3 = 10.
=> Seven plus three equals ten.

18.  Explanation:
0 + 9 = 9.
=> Zero plus nine equals nine.

19.  Explanation:
6 + 1 = 7.
=> Six plus one equals seven.

20.  Explanation:
5 + 2 = 7.
=> Five plus two equals seven.

21.  Explanation:
8 + 2 = 10.
=> Eight plus two equals ten.

22.  Explanation:
5 + 5 = 10.
=> Five plus five equals ten.

23.  Explanation:
4 + 0 = 4.
=> Four plus zero equals four.

24.  Explanation:
2 + 7 = 9.
=> Two plus seven equals nine.

25.  Explanation:
9 + 0 = 9.
=> Nine plus zero equals nine.

26.  Explanation:
6 + 4 = 10.
=> Six plus four equals ten.

27.  Explanation:
1 + 6 = 7.
=> One plus six equals seven.

28.  Explanation:
3 + 0 = 3.
=> Three plus zero equals three.

29.  Explanation:
2 + 8 = 10.
=> Two plus eight equals ten.

30.  Explanation:
5 + 3 = 8.
=> Five plus three equals eight.

31.  Explanation:
5 + 4 = 9.
=> Five plus four equals nine.

32.  Explanation:
2 + 4 = 6.
=> Two plus four equals six.

33.  Explanation:
7 + 0 = 7.
=> Seven plus zero equals seven.

34.  Explanation:
8 + 1 = 9.
=> Eight plus one equals nine.

35.  Explanation:
10 + 0 = 10.
=> Ten plus zero equals ten.

36.  Explanation:
1 + 2 = 3.
=> One plus two equals three.

Solve each problem.

37. There are 8 There are 2 What is the sum? 10 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? _________
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? ______
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? ______
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? _______