Question

直接寫得數(shù)． 1 2 + 1 3 =	18× 2 3 =	9 10 × 2 3 =	0× 7 8 =
3 4 - 2 5 =	5 7 ×21=	5 12 × 4 5 =	3 10 × 5 6
2- 7 9 =	0.125×0.125=

Answer 1

分析：依據(jù)分?jǐn)?shù)四則運(yùn)算的計(jì)算法則，即可逐題解答．

解答：解：

1 2 + 1 3 = 5 6	18× 2 3 =12	9 10 × 2 3 = 3 5	0× 7 8 =0
3 4 - 2 5 = 7 20	5 7 ×21=15	5 12 × 4 5 = 1 3	3 10 × 5 6 = 1 4
2- 7 9 = 11 9	0.125×0.125= 1 64

點(diǎn)評(píng)：此題主要考查分?jǐn)?shù)四則運(yùn)算的計(jì)算法則的靈活應(yīng)用．