Remember that to find a 3s fact,

add a 2s fact and a 1s fact. To

find a 4s fact, double the product

of a 2s fact.

1.3 X 7=___

3. 4 X 10 =

5.3 x 8 =

7.9 X 3 =

2.4 ×9=_

4.3 X 10 =

6.8 × 4 =

8..10 X 4 =