1. 8⋅7 9⋅8 8⋅8 72:8 56:8 48:8 9⋅8 7⋅4 8⋅3 9⋅6 42:7 18:9 28:4 72:9

Выполним умножение и деление столбиком:

$$8 \cdot 7 = 56$$

$$9 \cdot 8 = 72$$

$$8 \cdot 8 = 64$$

$$72 : 8 = 9$$

$$56 : 8 = 7$$

$$48 : 8 = 6$$

$$9 \cdot 8 = 72$$

$$7 \cdot 4 = 28$$

$$8 \cdot 3 = 24$$

$$9 \cdot 6 = 54$$

$$42 : 7 = 6$$

$$18 : 9 = 2$$

$$28 : 4 = 7$$

$$72 : 9 = 8$$