Question

直接写数： 7 20 ×25=	4 9 ×4=	6 17 × 51 28 =	14 15 × 3 7 =	（ 3 4 ）3=
1 5 - 1 6 =	7× 4 21 =	3.6× 7 6 =	5 8 × 7 30 =	2 5 + 3 5 × 2 3 =

Answer 1

考点：分数乘法

专题：运算顺序及法则

分析：根据分数加减乘除法的计算方法进行解答即可．

解答： 解：

7 20 ×25= 35 4	4 9 ×4= 16 9	6 17 × 51 28 = 9 14	14 15 × 3 7 = 2 5	（ 3 4 ）3=- 27 64
1 5 - 1 6 = 1 30	7× 4 21 = 4 3	3.6× 7 6 =4.2	5 8 × 7 30 = 7 48	2 5 + 3 5 × 2 3 = 4 5

点评：此题考查了分数加减乘除法的口算能力．