Cálculo mental

Multiplicaciones

3 x 20 = 3 x 20 = 60

4 x 200 = 4 x 200 = 800

4 x 20 =

5 x 80 =

5 x 60 =

2 x 400 =

4 x 40 =

5 x 70 =

9 x 20 =

8 x 20 =

2 x 600 =

3 x 50 =

5 x 400 =

2 x 60 =

5 x 200 =

7 x 20 =

8 x 400 =

4 x 400 =

2 x 200 =

7 x 30 =

6 x 600 =

1 x 200 =

8 x 300 =

3 x 900 =

2 x 900 =

7 x 400 =

4 x 20 =