Practice with the help of Spectrum Math Grade 1 Answer Key Chapter 1 Pretest regularly and improve your accuracy in solving questions.

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Addition and Subtraction Facts through 10

1.

Explanation:
5 + 1 = 6.
=> Five plus one equals six.

2.

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

3.

Explanation:
1 + 1 = 2.
=> One plus one equals two.

4.

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

5.

Explanation:
6 + 0 = 6.
=> Six plus zero equals six.

6.

Explanation:
4 + 1 = 5.
=> Four plus one equals five.

7.

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

8.

Explanation:
2 + 1 = 3.
=> Two plus one equals three.

9.

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

10.

Explanation:
1 + 3 = 4.
=> One plus three equals four.

11.

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

12.

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

13. 0 + 6 = ____
0 + 6 = 6.

Explanation:
0 + 6 = 6.
=> Zero plus six equals six.

14. 3 + 3 = ____
3 + 3 = 6.

Explanation:
3 + 3 = 6.
=> Three plus three equals six.

15. 0 + 4 = ____
0 + 4 = 4.

Explanation:
0 + 4 = 4.
=> Zero plus four equals four.

16. 3 + 1 = ____
3 + 1 = 4.

Explanation:
3 + 1 = 4.
=> Three plus one equals four.

17. 2 + 4 = ____

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

18. 1 + 5 = ____
1 + 5 = 6.

Explanation:
1 + 5 = 6.
=> One plus five equals six.

Subtract.

19.

Explanation:
Subtraction:
6 – 1 = 5.
=> Six minus one equals five.

20.

Explanation:
Subtraction:
4 – 2 = 2.
=> Four minus two equals two.

21.

Explanation:
Subtraction:
3 – 1 = 2.
=> Three minus one equals two.

22.

Explanation:
Subtraction:
5 – 3 = 2.
=> Five minus three equals two.

23.

Explanation:
Subtraction:
2 – 0 = 2.
=> Two minus zero equals two.

24.

Explanation:
Subtraction:
4 – 1 = 3.
=> Four minus one equals three.

25.

Explanation:
Subtraction:
5 – 2 = 3.
=> Six minus two equals three.

26.

Explanation:
Subtraction:
6 – 4 = 2.
=> Six minus four equals two.

27.

Explanation:
Subtraction:
2 – 1 = 1.
=> Two minus one equals one.

28.

Explanation:
Subtraction:
3 – 2 = 1.
=> Three minus two equals one.

29.

Explanation:
Subtraction:
6 – 5 = 1.
=> Six minus five equals one.

30.

Explanation:
Subtraction:
5 – 0 = 5.
=> Five minus zero equals five.

31. 4 – 3 = ____
4 – 3 = 1.

Explanation:
Subtraction:
4 – 3 = 1.
=> Four minus three equals one.

32. 6 – 2 = ____
6 – 2 = 4.

Explanation:
Subtraction:
6 – 2 = 4.
=> Six minus two equals four.

33. 5 – 4 = ____
5 – 4 = 1.

Explanation:
Subtraction:
5 – 4 = 1.
=> Five minus four equals one.

34. 6 – 3 = ___
6 – 3 = 3.

Explanation:
Subtraction:
6 – 3 = 3.
=> Six minus three equals three .

35. 1 – 0 = ___
1 – 0 = 1.

Explanation:
Subtraction:
1 – 0 = 1.
=> One minus zero equals one.

36. 2 – 2 = ___
2 – 2 = 0.

Explanation:
Subtraction:
2 – 2 = 0.
=> Two minus two equals zero.

Solve each problem.

37. There are 2 .
There are 4 .
How many in all ? _____
Total number of buildings and houses = 4.

Explanation:
Number of buildings = 2.
Number of Houses = 2.
Total number of buildings and houses = Number of buildings + Number of Houses
= 2 + 2
= 4.

38. Jeff has 4 .
Karen has 1 .
What is the difference? ______
The difference between Jeff and Karen having baseballs is 3.

Explanation:
Number of base balls Jeff has = 4.
Number of base balls Karen has = 1.
Difference:
Number of base balls Jeff has – Number of base balls Karen has
= 4 – 1
= 3.

39. There are 5 .
3 fly away.
Subtract 5 minus 3. _____
Number of butterflies are left = 2.
5 minus 3 equals 2.

Explanation:
Number of butterflies there = 5.
Number of butterflies flew away = 3.
Difference:
Number of butterflies are left = Number of butterflies there – Number of butterflies flew away
= 5 – 3
= 2.

40. There is 1 .
There are 2 .
Total number of pencils and pens there = 3.
1 plus 2 equals three.

Explanation:
Number of Pencils there = 1.
Number of pens there = 2.
Total number of pencils and pens there = Number of Pencils there + Number of pens there
= 1 + 2
= 3.

41.

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

42.

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

43.

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

44.

Explanation:
0 + 8 = 8.
=> Zero plus eight equals eight.

45.

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

46.

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

47.

Explanation:
4 + 4 = 8.
=> Four plus four equals eight.

48.

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

49.

Explanation:
3 + 6 = 9.
=> Three plus six equals nine.

50.

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

51.

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

52.

Explanation:
3 + 4 = 7.
=> Three plus four equals seven.

53.

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

54.

Explanation:
1 + 4 = 5.
=> One plus four equals five.

55.

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

56.

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

57.

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

58.

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

59.

Explanation:
Subtraction:
10 – 5 = 5.
=> Ten minus five equals five.

Subtract.

60.

Explanation:
Subtraction:
10 – 8 = 2.
=> Ten minus eight equals two.

61.

Explanation:
Subtraction:
9 – 3 = 6.
=> Nine minus three equals six.

62.

Explanation:
Subtraction:
8 – 6 = 2.
=> Eight minus six equals two.

63.

Explanation:
Subtraction:
7 – 1 = 6.
=> Seven minus one equals six.

64.

Explanation:
Subtraction:
9 – 0 = 9.
=> Nine minus zero equals nine.

65.

Explanation:
Subtraction:
8 – 7 = 1.
=> Eight minus seven equals one.

66.

Explanation:
Subtraction:
10 – 3 = 7.
=> Ten minus three equals seven.

67.

Explanation:
Subtraction:
7 – 7 = 0.
=> Seven minus seven equals zero.

68.

Explanation:
Subtraction:
9 – 5 = 4.
=> Nine minus five equals four.

69.

Explanation:
Subtraction:
8 – 1 = 7.
=> Eight minus one equals seven.

70.

Explanation:
Subtraction:
7 – 4 = 3.
=> Seven minus four equals three.

71.

Explanation:
Subtraction:
10 – 1 = 9.
=> Ten minus one equals nine.

72.

Explanation:
Subtraction:
9 – 8 = 1.
=> Nine minus eight equals one.

73.

Explanation:
Subtraction:
8 – 4 = 4.
=> Eight minus four equals four.

74.

Explanation:
Subtraction:
10 – 2 = 8.
=> Ten minus two equals eight.

75.

Explanation:
Subtraction:
7 – 0 = 7.
=> Seven minus zero equals seven.

76.

Explanation:
Subtraction:
10 – 9 = 1.
=> Ten minus nine equals one.

Solve each problem.

77. There are 4 .
5 more come.
Now how many are here? _______
Total number of rabbits there = 9.

Explanation:
Number of rabbits there = 4.
Number of rabbits more came = 5.
Total number of rabbits there = Number of rabbits there + Number of rabbits more came
= 4 + 5
= 9.

78. There are 9 .
There are 6 .
How many more than are there? _____
There are 3 more Â  Â than .

Explanation:
Number of leaves there = 9.
Number of leaves there = 6.
Difference:
Number of leaves there – Number of leaves there
= 9 – 6
= 3.

79.
Miguel has 10âŠ„.
How much money does he have left? ________ âŠ„
Number of âŠ„ Miguel is left with = 3.

Explanation:
Number of âŠ„ Miguel has = 10.
Cost of toy Miguel buys = 7âŠ„ .
Number of âŠ„ Miguel is left with = Number of âŠ„ Miguel has – Cost of toy Miguel buys
= 10 – 7
= 3.

80. Jenny has 5 .
She finds 2 more .
What is the sum of 5 plus 2? ________
Total number of flowers Jenny has now = 7.
The sum of 5 plus 2 equals 7.

Explanation:
Number of flowers Jenny has = 5.
Number of flowers Jenny finds more = 2.
Total number of flowers Jenny has now = Number of flowers Jenny has + Number of flowers Jenny finds more
= 5 + 2
= 7.

81. There are 8 .
3 ran away.
What is 8 minus 3? _____
Number of Squirrels left = 5.
8 minus 3 equals 5.

Explanation:
Number of Squirrels there = 8.
Number of Squirrels ran away = 3.
Number of Squirrels left = Number of Squirrels there – Number of Squirrels ran away
= 8 – 3
= 5.