Question

口算 1 3 + 1 4 =	10÷ 2 5 =	3 5 ÷ 9 10 =	1÷ 7 8 =
2 3 × 3 10 =	3 4 × 2 5 =	8× 3 8 =	9 11 ÷ 9 11 =

Answer 1

考点：分数乘法,分数除法

专题：运算顺序及法则

分析：运用分数加减及乘除法的计算法则进行口算即可．

解答：

解： 1 3 + 1 4 = 7 12	10÷ 2 5 =25	3 5 ÷ 9 10 = 2 3	1÷ 7 8 =1 1 7
2 3 × 3 10 = 1 5	3 4 × 2 5 = 3 10	8× 3 8 =3	9 11 ÷ 9 11 =1

点评：用分数作计算的结果，要把分数化成最简分数．