Subtracting Numbers to 20: Practice and Improve Your Skills

Question 1

Which of these is NOT a way to take 12 away from 18?

Accepted Answer

Add 12 to 18

Answer

Count back 12 on a number line

Answer

Take away 12 objects from a set of 18

Question 2

Use mental math to subtract 7 from 14. What is the answer?

Accepted Answer

6

Answer

5

Answer

7

Answer

8

Question 3

Which of these equations shows the subtraction of 6 from 14?

Accepted Answer

14 - 6

Answer

6 - 14

Answer

14 + 6

Question 4

Which of the following is not a subtraction equation?

Accepted Answer

12 + 3

Answer

10 - 5

Answer

15 - 7

Question 5

Sarah has 10 apples. She gives 4 to her friend. How many apples does Sarah have left?

Accepted Answer

6

Answer

8

Answer

12

Answer

14

Question 6

Which counter representation shows 17 - 9?

Accepted Answer

●●●●●●●●●○○○

Answer

●●●●●●●●●●●○

Answer

●●●●●●●●○○○○

Answer

●●●●●●●●●●○○

Question 7

What are the three related subtraction facts for the numbers 8, 3, and 5?

Accepted Answer

8 - 3 = 5, 5 - 3 = 8, 3 + 5 = 8

Answer

8 - 5 = 3, 5 - 3 = 8, 3 + 5 = 8

Answer

8 - 3 = 5, 5 - 8 = 3, 3 + 5 = 8

Answer

8 - 5 = 3, 5 - 8 = 3, 3 + 5 = 11

Question 8

There were 12 birds sitting on a tree branch. 5 birds fly away. How many birds remain?

Accepted Answer

7

Answer

5

Answer

9

Answer

11

Question 9

Which equation shows the subtraction of 6 from 12?

Accepted Answer

12 - 6

Answer

12 + 6

Answer

6 - 12

Answer

12 x 6

Question 10

What is NOT a strategy for finding the difference between two numbers?

Accepted Answer

Adding the numbers

Answer

Counting backward

Answer

Using a number line

Answer

Subtracting the smaller number from the larger number

Question 11

Which way shows the subtraction 13 - 5 on a number line?

Accepted Answer

Move 5 steps to the left from 13

Answer

Move 5 steps to the right from 13

Answer

Move 13 steps to the right from 5

Answer

Move 13 steps to the left from 5

Question 12

A fruit vendor has 20 apples. He sells 12 apples. How many apples does he have left?

Accepted Answer

8

Answer

9

Answer

10

Answer

12

Question 13

There are 10 birds sitting on a tree branch. 4 fly away. How many birds are left?

Accepted Answer

6

Answer

4

Answer

7

Answer

10

Question 14

When we subtract, what are we doing?

Accepted Answer

Taking away numbers

Answer

Adding numbers together

Question 15

Which of these equations means 'take away 6 from 12'?

Accepted Answer

12 - 6

Answer

12 + (-6)

Answer

(-6) - 12

Question 16

There are 12 birds on a tree branch. 5 birds fly away. How many birds are left on the branch?

Accepted Answer

7

Answer

5

Answer

12

Answer

17

Question 17

Which number sentence shows the difference between 18 and 9?

Accepted Answer

18 - 9

Answer

9 - 18

Answer

18 + 9

Answer

9 + 18

Question 18

What number should go in the blank? 10 - __ = 6

Accepted Answer

3

Answer

2

Answer

4

Answer

5

Question 19

What is the difference between 20 and 7?

Accepted Answer

13

Answer

14

Question 20

There are 14 children playing in the park. 6 children go home. How many children are still playing?

Accepted Answer

8

Answer

10

Answer

14

Question 21

Which counter model shows the subtraction 10 - 4?

Accepted Answer

Image of counters representing 10 - 4

Answer

Image of counters representing 4 - 10

Question 22

Calculate the missing number: 15 - __ = 9

Accepted Answer

4

Answer

5

Answer

6

Question 23

What number should you subtract from 13 to get 5?

Accepted Answer

13 - 5

Answer

13 + 5

Answer

5 - 13

Question 24

What is 12 minus 5?

Accepted Answer

6

Answer

7

Answer

8

Question 25

Use a number line to find 12 minus 5:

Accepted Answer

7

Answer

5

Answer

8

Answer

9

Question 26

Which equation shows you how to find the difference between 18 and 9?

Accepted Answer

18 take away 9 is 9

Answer

9 plus 18 is 9

Answer

9 minus 18 is 9

Answer

18 plus 9 is 9

Question 27

Find the number sentence that shows 12 minus 5.

Accepted Answer

12 - 5 = 7

Answer

5 + 12 = 17

Answer

7 - 12 = -5

Answer

5 - 12 = -7

Question 28

What number is 10 subtract 3?

Accepted Answer

7

Answer

6

Answer

9

Answer

8

Question 29

What is 10 minus 10?

Accepted Answer

0

Answer

20

Answer

10

Answer

1

Question 30

Which of these equations shows the subtraction of 11 from 18?

Accepted Answer

18 - 11

Answer

11 - 18

Answer

18 + 11

Answer

11 + 18

Question 31

Which of the following is NOT a helpful strategy for subtracting 14 from 20?

Accepted Answer

Adding 6

Answer

Using a number line

Answer

Subtracting 10 and then 4

Answer

Counting back

Question 32

Which number sentence shows the subtraction of 6 from 20?

Accepted Answer

20 - 6

Answer

6 - 20

Answer

20 + 6

Answer

6 * 20

Question 33

Which of these is NOT a strategy for subtracting numbers up to 20?

Accepted Answer

Multiplication

Answer

Counters

Answer

Number line

Answer

Mental strategies

Question 34

You have 10 sweets and eat 3. How many sweets are left?

Accepted Answer

7

Answer

10

Answer

13

Answer

3

Question 35

What is 3 less than 14?

Accepted Answer

11

Answer

7

Answer

17

Answer

14

Question 36

What number goes in the box? 19 -  ?  = 11

Accepted Answer

8

Answer

19

Answer

30

Answer

11

Question 37

You have 16 pencils and give 4 to your friend. How many pencils do you have left?

Accepted Answer

12

Answer

20

Answer

4

Answer

16

Question 38

13 take away 5 equals?

Accepted Answer

8

Answer

18

Answer

5

Answer

13

Question 39

Start at 15 on the number line and count back 6. What number do you land on?

Accepted Answer

9

Answer

6

Answer

21

Answer

15

Question 40

What is 15 minus 7?

Accepted Answer

8

Answer

6

Answer

11

Answer

9

Question 41

Which equation represents the difference between 18 and 12?

Accepted Answer

18 - 12

Answer

12 + 18

Answer

12 - 18

Answer

18 + 12

Question 42

What is 20 - 11?

Accepted Answer

9

Answer

11

Answer

10

Answer

8

Question 43

What is 15 take away 7?

Accepted Answer

8

Answer

9

Answer

6

Question 44

Start at 12 on the number line. Count back 5 spaces. What number do you land on?

Accepted Answer

7

Answer

8

Answer

6

Question 45

Which number sentence shows 10 take away 3?

Accepted Answer

10 - 3 = 7

Answer

3 - 10 = 7

Answer

10 + 3 = 13

Answer

3 + 10 = 13

Question 46

Think in your head: 15 take away 8. What is the answer?

Accepted Answer

7

Answer

8

Answer

6

Answer

9

Question 47

What is the difference between 20 and 12?

Accepted Answer

8

Answer

9

Answer

7

Answer

6

Question 48

Add 10 and 7. Then take away 5. What is the answer?

Accepted Answer

12

Answer

14

Answer

11

Answer

13

Question 49

Which subtraction fact is wrong?

Accepted Answer

15 - 6 = 11

Answer

10 - 5 = 5

Answer

18 - 9 = 9

Answer

12 - 4 = 8

Question 50

Use counters to help you solve: 14 take away 6. How many counters are left?

Accepted Answer

8

Answer

9

Answer

7

Answer

6

Question 51

What number goes in the box to make this number sentence true:  ? - 7 = 9

Accepted Answer

16

Answer

17

Answer

18

Answer

15