乘法分配律练习题

1) 计算下列表达式:

a) 2 * (3 + 4)

解:
2 * (3 + 4) = 2 * 7 = 14

b) (5 - 3) * 4

解:
(5 - 3) * 4 = 2 * 4 = 8

c) 6 * (2 + 3)

解:
6 * (2 + 3) = 6 * 5 = 30

d) (9 - 6) * 7

解:
(9 - 6) * 7 = 3 * 7 = 21

2) 将乘法分配律应用到下列表达式中:

a) 3 * (4 + 5)

解:
根据乘法分配律, 3 * (4 + 5) = (3 * 4) + (3 * 5) = 12 + 15 = 27

b) (6 - 2) * 8

解:
根据乘法分配律, (6 - 2) * 8 = (6 * 8) - (2 * 8) = 48 - 16 = 32

c) 7 * (9 + 2)

解:
根据乘法分配律, 7 * (9 + 2) = (7 * 9) + (7 * 2) = 63 + 14 = 77

d) (10 - 3) * 6

解:
根据乘法分配律, (10 - 3) * 6 = (10 * 6) - (3 * 6) = 60 - 18 = 42