Doubles and Halves
Repeated Addition and Subtraction
Equal Groups
Fact Families
Multiply by Multiples of 10
100

Double 5

10

100

Show 80 ÷ 10 by skip counting backwards.

70, 60, 50, 40, 30, 20, 10, 0

80 ÷ 10 = 8

100

Show 7 × 2 using equal groups.

Ex. (:::.) (:::.)

2 groups of 7 or 7 groups of 2

7 × 2 = 14

100

Show 45 ÷ 5 using multiplication.

5 × 9 = 45

45 ÷ 5 = 9

100

6 × 20 = ☐

120

200

Double 8

16

200

Show 10 × 6 by skip counting.

10, 20, 30, 40, 50, 60

10 × 6 = 60

200

Show 20 ÷ 2 using equal groups.

Ex. (:::::) (:::::)

20 ÷ 2 = 10

200

Show 10 × 10 using division.

100 ÷ 10 = 10

10 × 10 = 100

200

2 × 300 = ☐

600

300

Half 18

9

300

Show 30 ÷ 10 using repeated subtraction.

30 - 10 = 20, 20 - 10 = 10, 10 - 10 = 0

30 ÷ 10 = 3

300

Show 9 × 5 using equal groups.

Ex. (:.:) (:.:) (:.:) (:.:) (:.:) (:.:) (:.:) (:.:) (:.:)

9 groups of 5 or 5 groups of 9

9 × 5 = 45

300

Show 30 ÷ 5 using multiplication.

5 × 6 = 30

30 ÷ 5 = 6

300

5 × 100 = ☐

500

400

Double 25

50

400

Show 5 × 8 using repeated addition.

5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 = 40

5 × 8 = 40

400

Show 40 ÷ 10 using equal groups.

Ex. (:::::) (:::::) (:::::) (:::::)

40 ÷ 10 = 4

400

Write the fact family for the equal groups below.

(:.:) (:.:) (:.:)

5 × 3 = 15          3 × 5 = 15

15 ÷ 5 = 3          15 ÷ 3 = 5

400

2 × 800 = ☐

1,600

500

Half 100

50

500

Show 25 ÷ 5 using repeated subtraction.

25 - 5 = 20, 20 - 5 = 15, 15 - 5 = 10, 10 - 5 = 5, 5 - 5 = 0

25 ÷ 5 = 5

500

Show 55 ÷ 5 using equal groups.

Ex. (:.:) (:.:) (:.:) (:.:) (:.:)

(:.:) (:.:) (:.:) (:.:) (:.:) (:.:)

55 ÷ 5 = 11

500

Write the fact family for the equal groups below.

(::) (::) (::) (::) (::)

4 × 5 = 20          5 × 4 = 20

20 ÷ 4 = 5          20 ÷ 5 = 4

500

5 × 600 = ☐

3,000