Question

直接写得数 2 5 + 1 4 =	8 9 ÷ 4 3 =	3 7 ÷ 1 6 =	2 3 × 1 2 =	7× 4 9 × 1 7 =
2 9 ÷4=	2 3 × 3 5 =	3- 3 8 =	7 12 × 3 14 =	6÷2.5+3.5=
5 12 ÷ 3 4 =	3 2 - 5 6 =	12× 1 4 =	51÷ 5 17 =	4 19 × 1 4 ÷ 4 19 =

Answer 1

考点：分数的加法和减法,分数乘法

专题：运算顺序及法则

分析：按照分数四则计算的计算法则以及混合运算的运算顺序直接计算得出答案即可．

解答：

解： 2 5 + 1 4 = 13 20	8 9 ÷ 4 3 = 2 3	3 7 ÷ 1 6 = 18 7	2 3 × 1 2 = 1 3	7× 4 9 × 1 7 = 4 9
2 9 ÷4= 1 18	2 3 × 3 5 = 2 5	3- 3 8 =2 5 8	7 12 × 3 14 = 1 8	6÷2.5+3.5=5.9
5 12 ÷ 3 4 = 5 9	3 2 - 5 6 = 2 3	12× 1 4 =3	51÷ 5 17 = 867 5	4 19 × 1 4 ÷ 4 19 = 1 4

点评：掌握计算法则和混合运算的运算顺序是解决问题的关键．