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Addition & Subtraction Facts within 20

1

Quick Addition Facts (Sums to 10)

Fill in the missing number. Be quick!

10
6
?
9
?
4
8
3
?
10
?
3
7
2
?
10
?
8
2

More Addition Facts (Sums to 10)

Fill in the missing number.

6
4
?
10
?
5
9
7
?
8
?
6
7
3
?
10
?
1
3

Add the Stars

Count all the stars in each row. Write the total.

?
?
?
4

Add the Hearts

Count all the hearts in each row. Write the total.

?
?
?
5

Match Additions to Answers (to 10)

Draw a line to match each addition to its answer.

4 + 6
3 + 5
7 + 2
2 + 9
9
10
8
11
6

True or False? Addition to 10

Circle TRUE if the addition is correct, or FALSE if it is wrong.

5 + 5 = 10

TRUE
FALSE

3 + 6 = 8

TRUE
FALSE

4 + 4 = 8

TRUE
FALSE

7 + 2 = 10

TRUE
FALSE
7

Ten Frames — Making 10

Look at the ten frame. How many more to make 10?

?
?
?
?
8

What Makes 10?

Circle the number that makes 10.

6 + ___ = 10

3
4
5

2 + ___ = 10

7
8
9

9 + ___ = 10

0
1
2

5 + ___ = 10

4
5
6
9

Addition Facts (Sums to 15)

Fill in the missing number.

12
7
?
13
?
5
14
8
?
11
?
4
15
9
?
12
?
9
10

More Facts (Sums 11–15)

Fill in the missing number.

11
6
?
13
?
4
15
7
?
14
?
6
12
5
?
11
?
3
11

True or False? Addition to 15

Circle TRUE if the addition is correct, or FALSE if it is wrong.

8 + 6 = 14

TRUE
FALSE

7 + 9 = 15

TRUE
FALSE

5 + 8 = 13

TRUE
FALSE

6 + 6 = 11

TRUE
FALSE
12

Match Additions to Answers (11–15)

Draw a line to match each addition to its answer.

7 + 5
7 + 8
6 + 5
8 + 5
12
15
11
13
13

Quick Addition Quiz (to 15)

Circle the correct answer.

6 + 7 = ?

12
13
14

8 + 4 = ?

11
12
13

9 + 5 = ?

13
14
15

7 + 7 = ?

13
14
15
14

Addition Facts (Sums 16–20)

Fill in the missing number.

16
8
?
17
?
8
18
9
?
19
?
10
20
10
?
16
?
7
15

Match Additions (16–20)

Draw a line to match each addition to its answer.

8 + 9
9 + 9
10 + 10
7 + 9
16
17
18
20
16

Quick Addition Quiz (16–20)

Circle the correct answer.

9 + 8 = ?

16
17
18

10 + 9 = ?

18
19
20

8 + 8 = ?

14
15
16

10 + 7 = ?

16
17
18
17

Subtraction Facts (from 10–12)

Fill in the missing number. Think fast!

10
?
4
11
5
?
12
?
5
10
3
?
11
?
8
12
6
?
18

Subtraction Facts (from 13–15)

Fill in the missing number.

13
9
?
14
?
8
15
7
?
13
?
6
14
5
?
15
?
9
19

True or False? Subtraction (10–15)

Circle TRUE or FALSE.

12 − 5 = 7

TRUE
FALSE

14 − 7 = 8

TRUE
FALSE

10 − 4 = 6

TRUE
FALSE

15 − 8 = 7

TRUE
FALSE
20

Match Subtractions (10–15)

Circle the correct answer for each subtraction.

12 − 5 = ?

6
7
8

14 − 6 = ?

7
8
9

11 − 3 = ?

7
8
9

15 − 7 = ?

7
8
9
21

Quick Subtraction Quiz (10–15)

Circle the correct answer.

13 − 7 = ?

5
6
7

11 − 5 = ?

5
6
7

15 − 9 = ?

5
6
7

12 − 8 = ?

3
4
5
22

Subtraction Facts (from 16–18)

Fill in the missing number.

16
?
7
17
9
?
18
?
9
16
8
?
17
?
8
18
10
?
23

Subtraction Facts (from 19–20)

Fill in the missing number.

19
10
?
20
?
8
19
?
10
20
11
?
20
?
5
19
7
?
24

True or False? Subtraction (16–20)

Circle TRUE or FALSE.

15 − 7 = 8

TRUE
FALSE

17 − 9 = 7

TRUE
FALSE

13 − 6 = 7

TRUE
FALSE

18 − 9 = 8

TRUE
FALSE
25

Match Subtractions (16–20)

Draw a line to match each subtraction to its answer.

14 − 6
16 − 9
20 − 8
17 − 8
9
12
8
7
26

Quick Subtraction Quiz (16–20)

Circle the correct answer.

18 − 9 = ?

8
9
10

20 − 7 = ?

12
13
14

16 − 8 = ?

7
8
9

19 − 10 = ?

8
9
10
27

Bridge Through 10

Use the ten frame to help solve each addition. Fill in the answer.

?
?
?
?
28

Fact Families

Match each addition to its related subtraction.

8 + 7 = 15
9 + 6 = 15
7 + 5 = 12
9 + 8 = 17
17 − 9 = 8
12 − 7 = 5
15 − 8 = 7
15 − 9 = 6
29

More Fact Families

Match each addition to its related subtraction.

6 + 8 = 14
7 + 9 = 16
5 + 6 = 11
10 + 8 = 18
18 − 10 = 8
14 − 6 = 8
16 − 7 = 9
11 − 5 = 6
30

Mixed Facts — Speed Round!

Fill in the missing number as fast as you can!

16
8
?
13
?
7
19
10
?
14
?
5
18
9
?
20
?
11
17
8
?
11
?
6
31

Mixed Facts — Speed Round 2!

Keep going! Fill in the missing number.

15
6
?
12
?
4
20
10
?
14
?
9
16
7
?
13
?
8
18
10
?
11
?
7
32

Fact Family Triangles

Fill in the missing numbers to complete each fact family.

8
6
?
9
16
?
5
12
?
7
15
?
33

More Fact Family Triangles

Fill in the missing numbers.

6
13
?
9
18
?
8
17
?
6
11
?
34

Doubles and Near Doubles

Fill in the missing number using doubles.

12
6
?
14
7
?
16
8
?
18
9
?
13
6
?
15
7
?
35

Doubles Quiz

Circle the correct double.

Double 6 = ?

10
11
12

Double 8 = ?

14
15
16

Double 9 = ?

16
17
18

Double 10 = ?

18
19
20
36

Near Doubles Quiz

Use doubles to help. Circle the correct answer.

6 + 7 = ? (double 6 + 1)

12
13
14

8 + 7 = ? (double 7 + 1)

14
15
16

9 + 8 = ? (double 8 + 1)

16
17
18

5 + 6 = ? (double 5 + 1)

10
11
12
37

Write Your Own Fact Families

Use these three numbers to write 2 addition facts and 2 subtraction facts.

Numbers: 5, 9, 14 ___ + ___ = ___ ___ + ___ = ___ ___ − ___ = ___ ___ − ___ = ___

Numbers: 8, 7, 15 ___ + ___ = ___ ___ + ___ = ___ ___ − ___ = ___ ___ − ___ = ___

Numbers: 6, 9, 15 ___ + ___ = ___ ___ + ___ = ___ ___ − ___ = ___ ___ − ___ = ___

38

Make 20 — Different Ways

Fill in the missing part to make 20.

20
12
?
20
?
7
20
15
?
20
?
3
20
11
?
20
?
6
39

Which Addition Is Correct?

Circle the correct addition fact.

Which equals 15?

6 + 8
7 + 8
9 + 5

Which equals 13?

8 + 6
7 + 6
9 + 5

Which equals 17?

8 + 9
7 + 9
6 + 9

Which equals 11?

5 + 5
6 + 5
7 + 5
40

Which Subtraction Is Correct?

Circle the correct subtraction fact.

Which equals 8?

15 − 7
14 − 7
16 − 7

Which equals 5?

12 − 6
13 − 8
11 − 5

Which equals 9?

18 − 9
17 − 9
16 − 9

Which equals 6?

14 − 7
13 − 7
15 − 8
41

Sort: Equals 14 or Not?

Sort these additions. Which ones equal 14?

8 + 6
9 + 5
7 + 7
10 + 4
6 + 9
8 + 7
Equals 14
Does not equal 14
42

Sort: Sum Greater or Less Than 15?

Sort each addition.

6 + 7 = 13
9 + 8 = 17
8 + 7 = 15
5 + 6 = 11
9 + 9 = 18
7 + 6 = 13
Sum less than 15
Sum of 15 or more
43

Double Ten Frames

Count the filled circles in the double ten frame.

?
?
?
?
44

Subtraction Speed Round

Fill in the missing number as fast as you can!

15
?
8
13
7
?
18
?
10
16
9
?
20
?
13
14
8
?
17
?
9
12
5
?
45

More Fact Family Triangles

Fill in the missing number for each fact family.

5
8
?
7
16
?
6
14
?
9
17
?
46

Addition and Subtraction Word Problems

Solve each problem. Show your working.

There are 8 birds in a tree. 5 more fly in. How many birds now?

You have 14 stickers. You give away 6. How many are left?

There are 9 red flowers and 7 yellow flowers. How many altogether?

47

More Word Problems

Solve each problem.

Sam has 17 marbles. He loses 8. How many does he have left?

There are 6 boys and 9 girls in a group. How many children altogether?

A basket has 20 eggs. 12 are brown. How many are white?

48

Home Activity: Speed Drills

Practise your addition and subtraction facts at home!

  • 1Make flashcards for all facts to 20. Can you answer each one in under 3 seconds?
  • 2Play 'Fact War' — flip two cards and add them. Whoever says the answer first wins!
  • 3Roll two dice and add the numbers. Now double the answer. What do you get?
  • 4Ask someone to quiz you: What's 8 + 7? What's 15 − 9? Keep practising!
49

Trace Key Addition Facts

Trace these numbers that appear often in addition facts.

11
12
13
14
15
16
17
18
19
20
50

Ten Frames — Subtraction

Look at the ten frame. Write the subtraction fact.

?
?
?
?
?
51

Double Ten Frames — Adding to 20

Count the filled circles. Write the number shown.

?
?
?
?
?
52

Make 15 — Different Ways

Fill in the missing part to make 15.

15
8
?
15
?
6
15
11
?
15
?
4
15
10
?
15
?
9
53

Fact Families Speed Round 3

Fill in the missing number as fast as you can!

11
4
?
13
?
5
17
8
?
19
?
9
14
6
?
16
?
7
20
12
?
18
?
11
54

Count and Add Stars and Flowers

Count the objects in each row. Write the addition.

Stars + Flowers
?
Hearts + Diamonds
?
Apples + Fish
?
55

Add Two Groups

Count each group. Write the total.

?
?
?
?
56

Match Subtractions to Additions

Match each subtraction to the related addition.

14 − 9 = 5
16 − 8 = 8
20 − 13 = 7
15 − 6 = 9
13 + 7 = 20
9 + 6 = 15
8 + 8 = 16
5 + 9 = 14
57

Match Related Facts

Match each fact to a related fact.

7 + 8 = 15
9 + 3 = 12
6 + 9 = 15
8 + 8 = 16
15 − 6 = 9
16 − 8 = 8
12 − 3 = 9
15 − 7 = 8
58

Which Answer Is Wrong?

Circle the incorrect answer.

6 + 8 = 14, 7 + 8 = 15, 8 + 8 = 15

6+8=14
7+8=15
8+8=15

17−9=8, 18−9=9, 19−9=11

17−9=8
18−9=9
19−9=11

5+9=14, 6+9=15, 7+9=15

5+9=14
6+9=15
7+9=15

20−4=16, 20−5=15, 20−6=13

20−4=16
20−5=15
20−6=13
59

Addition Pattern — Add 1 Each Time

Continue the pattern.

?
?
?
?
?
?
?
?
?
?
?
?
60

Sort Facts by Answer

Sort these additions by whether their answer is less than 15 or 15 and above.

7 + 6 = 13
8 + 9 = 17
6 + 9 = 15
5 + 7 = 12
9 + 9 = 18
4 + 8 = 12
Answer < 15
Answer ≥ 15
61

Sort: Addition or Subtraction?

Sort each number sentence.

9 + 8 = 17
15 − 7 = 8
13 − 6 = 7
6 + 6 = 12
20 − 11 = 9
7 + 9 = 16
Addition
Subtraction
62

How Many Did You Get Right?

Practise facts and record your score in each round.

ItemTallyTotal
Round 1
Round 2
Round 3
Round 4
63

Fact Families Found

Read the graph of fact families discovered.

Sum of 10
Sum of 12
Sum of 15
Sum of 20
1

Which sum has the most fact families?

2

How many fact families were found in total?

3

How many more sum-of-15 than sum-of-10 families are there?

64

Compare Addition Results

Circle the larger sum.

Which sum is larger?

vs

Which sum is larger?

vs

Are these equal?

vs

Which is larger?

vs
65

Number Line — Add On

Fill in the missing numbers on each addition number line.

9
11
12
13
?
14
15
17
18
?
7
9
10
?
?
66

Number Line — Subtract

Fill in the missing numbers on each subtraction number line.

20
19
17
16
?
15
14
12
11
?
13
11
10
?
?
67

Three Numbers — Addition Challenge

Add three numbers together. Show your working.

4 + 6 + 7 = ___ I worked it out by: ___

5 + 5 + 9 = ___ I worked it out by: ___

8 + 2 + 6 = ___ I worked it out by: ___

68

Create a Fact Family Poster

Choose two numbers. Write all four facts in the fact family.

My two numbers: ___ and ___ ___ + ___ = ___ ___ + ___ = ___ ___ − ___ = ___ ___ − ___ = ___

69

Add Three Numbers

Circle the correct answer when adding three numbers.

3 + 7 + 4 = ?

13
14
15

6 + 4 + 8 = ?

17
18
19

5 + 5 + 7 = ?

15
16
17

9 + 1 + 9 = ?

18
19
20
70

Story Problems

Solve each story problem. Show your working.

Lee has 9 red stickers and 8 blue stickers. How many stickers altogether?

There are 20 seats on a bus. 13 are taken. How many are empty?

Anna picked 15 flowers. She gave 6 to her mum. How many did she keep?

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