Double 5
10
Show 80 ÷ 10 by skip counting backwards.
70, 60, 50, 40, 30, 20, 10, 0
80 ÷ 10 = 8
Show 7 × 2 using equal groups.
Ex. (:::.) (:::.)
2 groups of 7 or 7 groups of 2
7 × 2 = 14
Show 45 ÷ 5 using multiplication.
5 × 9 = 45
45 ÷ 5 = 9
6 × 20 = ☐
120
Double 8
16
Show 10 × 6 by skip counting.
10, 20, 30, 40, 50, 60
10 × 6 = 60
Show 20 ÷ 2 using equal groups.
Ex. (:::::) (:::::)
20 ÷ 2 = 10
Show 10 × 10 using division.
100 ÷ 10 = 10
10 × 10 = 100
2 × 300 = ☐
600
Half 18
9
Show 30 ÷ 10 using repeated subtraction.
30 - 10 = 20, 20 - 10 = 10, 10 - 10 = 0
30 ÷ 10 = 3
Show 9 × 5 using equal groups.
Ex. (:.:) (:.:) (:.:) (:.:) (:.:) (:.:) (:.:) (:.:) (:.:)
9 groups of 5 or 5 groups of 9
9 × 5 = 45
Show 30 ÷ 5 using multiplication.
5 × 6 = 30
30 ÷ 5 = 6
5 × 100 = ☐
500
Double 25
50
Show 5 × 8 using repeated addition.
5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 = 40
5 × 8 = 40
Show 40 ÷ 10 using equal groups.
Ex. (:::::) (:::::) (:::::) (:::::)
40 ÷ 10 = 4
Write the fact family for the equal groups below.
(:.:) (:.:) (:.:)
5 × 3 = 15 3 × 5 = 15
15 ÷ 5 = 3 15 ÷ 3 = 5
2 × 800 = ☐
1,600
Half 100
50
Show 25 ÷ 5 using repeated subtraction.
25 - 5 = 20, 20 - 5 = 15, 15 - 5 = 10, 10 - 5 = 5, 5 - 5 = 0
25 ÷ 5 = 5
Show 55 ÷ 5 using equal groups.
Ex. (:.:) (:.:) (:.:) (:.:) (:.:)
(:.:) (:.:) (:.:) (:.:) (:.:) (:.:)
55 ÷ 5 = 11
Write the fact family for the equal groups below.
(::) (::) (::) (::) (::)
4 × 5 = 20 5 × 4 = 20
20 ÷ 4 = 5 20 ÷ 5 = 4
5 × 600 = ☐
3,000