Arithmetic

Have them work the problems out in their head, without a calculator. Counting on fingers is fine. Go back over any wrong answers together.

Exercise 1

Calculate the following subtractions.

Attention
Memory
Problem solving

8 − 1 =

3 − 1 =

4 − 2 =

7 − 2 =

5 − 2 =

6 − 4 =

5 − 3 =

7 − 5 =

4 − 2 =

Show answer

7, 2, 2 / 5, 3, 2 / 2, 2, 2

Exercise 2

Calculate the following additions.

Attention
Memory
Problem solving

8 + 1 =

3 + 4 =

2 + 7 =

7 + 2 =

5 + 2 =

3 + 4 =

5 + 3 =

3 + 6 =

2 + 4 =

Show answer

9, 7, 9 / 9, 7, 7 / 8, 9, 6

Exercise 3

Calculate the following multiplications.

Attention
Memory
Problem solving

8 × 1 =

3 × 1 =

4 × 2 =

7 × 2 =

5 × 2 =

3 × 4 =

5 × 3 =

4 × 5 =

6 × 2 =

Show answer

8, 3, 8 / 14, 10, 12 / 15, 20, 12

Exercise 4

Calculate the following divisions.

Attention
Memory
Problem solving

8 ÷ 1 =

3 ÷ 1 =

4 ÷ 2 =

8 ÷ 2 =

15 ÷ 3 =

6 ÷ 3 =

6 ÷ 2 =

9 ÷ 3 =

10 ÷ 2 =

Show answer

8, 3, 2 / 4, 5, 2 / 3, 3, 5