High School: 9th and 10th Grade - Math - Addition And Subtraction Facts To 100 Solution - MCQGeeks.com

Q.1.

Which one of the following number pairs do not add up to give 100?

7%
100 + 0
0%
90 + 10
0%
60 + 40
93%
20 + 18

Q.2.

Which number fact is incorrect?

100%
6 + 40 = 100
0%
60 + 40 = 100
0%
40 + 60 = 100
0%
100 - 60 = 40

Q.3.

Which number is missing: 10 + ? = 100

0%
100
0%
9
100%
90
0%
10

Q.4.

Which three pairs of numbers all add up to 100?

58%
20 + 80 10 + 90 50 + 50
17%
10 + 80 20 + 18 60 + 4
17%
12 + 18 20 + 8 100 + 10
8%
40 + 6 50 + 5 10 + 9

Q.5.

Which of these three other facts go with 30 + 70 = 100?

9%
100 + 30 = 70 70 - 30 = 100 30 - 70 = 100
27%
30 + 30 = 70 70 - 30 = 100 30 - 100 = 70
0%
70 + 70 = 100 30 +30 = 100 100 - 100 = 30
64%
70 + 30 = 100 100 - 30 = 70 100 - 70 = 30

Q.6.

Which of the following is true?

18%
6 + 4 = 10, so 60 + 4 = 100
82%
6 + 4 = 10, so 60 + 40 = 100
0%
6 + 4 = 10, so 16 + 14 = 100
0%
6 + 4 = 10, so 6 + 40 = 100

Q.7.

Which 'family' of facts is incorrect?

22%
10 + 90 = 100 90 + 10 = 100 100 - 90 = 10 100 - 10 = 90
11%
20 + 80 = 100 80 + 20 = 100 100 - 20 = 80 100 - 80 = 20
67%
60 + 50 = 100 50 + 60 = 100 100 - 60 = 50 100 - 50 = 60
0%
30 + 70 = 100 70 + 30 = 100 100 - 30 = 70 100 - 70 = 30

Q.8.

Which of the following is true?

0%
10 - 80 = 20
100%
100 - 20 = 80
0%
80 - 20 = 100
0%
20 - 80 = 100

Q.9.

If you know that 2 + 8 = 10, what else do you know?

88%
20 + 80 = 100
0%
12 + 18 = 20
12%
2 + 80 = 100
0%
8 + 20 = 100

Q.10.

Which 'family' of facts is incorrect?

11%
35 + 65 = 100 65 + 35 = 100 100 - 35 = 65 100 - 65 = 35
0%
25 + 75 = 100 75 + 25 = 100 100 - 25 = 75 100 - 75 = 25
11%
15 + 85 = 100 85 + 15 = 100 100 - 85 = 15 100 - 15 = 85
78%
65 + 45 = 100 45 + 65 = 100 100 - 65 = 45 100 - 45 = 65