High School: 9th and 10th Grade - Math - Addition And Subtraction Facts To 20 Solution - MCQGeeks.com

Q.1.

Which of the following is true?

50%
12 - 20 = 8
25%
20 - 2 = 18
0%
8 + 20 = 12
25%
18 + 20 = 2

Q.2.

Which number is missing: 17 + ? = 20

0%
5
100%
3
0%
7
0%
9

Q.3.

Which 'family' of facts is incorrect?

25%
7 + 13 = 20 13 + 7 = 20 20 - 13 = 7 20 - 7 = 13
25%
8 + 12 = 20 12 + 8 = 20 20 - 8 = 12 20 - 12 = 8
25%
9 + 11 = 20 11 + 9 = 20 20 - 11 = 9 20 - 9 = 11
25%
4 + 14 = 20 14 + 4 = 20 20 - 4 = 14 20 - 14 = 4

Q.4.

Which of the following is true?

0%
2 + 18 = 20 so 20 + 18 = 2
100%
2 + 18 = 20 so 18 + 2 = 20
0%
2 + 18 = 20 so 20 + 2 = 18
0%
2 + 18 = 20 so 18 + 20 = 2

Q.5.

Which number fact is incorrect?

0%
11 + 9 = 20
0%
9 + 11 = 20
67%
20 - 9 = 11
33%
11 - 20 = 9

Q.6.

Which 'family' of facts is incorrect?

0%
2 + 18 = 20 18 + 2 = 20 20 - 18 = 2 20 - 2 = 18
100%
16 + 5 = 20 5 + 16 = 20 20 - 16 = 5 20 - 5 = 16
0%
5 + 15 = 20 15 + 5 = 20 20 - 5 = 15 20 - 15 = 5
0%
10 + 10 = 20 20 - 10 = 10

Q.7.

Which of the following pairs of number do not add up to give 20?

0%
9 + 11
0%
2 + 18
100%
16 + 5
0%
20 + 0

Q.8.

Which three other facts go with 16 + 4 = 20?

0%
20 + 16 = 4 20 + 4 = 16 16 - 20 = 4
0%
16 - 20 = 4 4 - 20 = 16 20 + 16 = 4
50%
4 + 16 = 20 16 - 4 = 20 4 - 16 = 20
50%
4 + 16 = 20 20 - 16 = 4 20 - 4 = 16

Q.9.

Which three pairs of numbers all add up to 20?

50%
19 + 1 17 + 3 5 + 15
0%
12 + 9 11 + 7 3 + 16
0%
7 + 20 6 + 12 7 + 19
50%
4 + 12 16 + 8 20 + 1

Q.10.

If you know that 14 + 6 = 20, what else do you know?

0%
20 + 14 = 6
50%
20 - 14 = 6
25%
14 - 20 = 6
25%
6 - 14 = 20