Question

直接写得数． 2/5-1/10=	16÷2/7=	1/2÷3/5=	1/7×1/7=	1/4×2/5=
5/6-1/2=	2/7×0+9=	3/5×1/21=	2/7×21=	14/17÷7=
1÷5-1/5=	4/7+4/7×6=	（1/8+4/8）×4/5=	6×5÷1/2=	1/9÷1/3=
5/9×1/5÷5/9×1/5=

Answer 1

分析：根据分数加减法、分数乘除法和分数的四则混合运算进行计算即可得到答案．

解答：解：

2 5 - 1 10 = 3 10	16÷ 2 7 =56	1 2 ÷ 3 5 = 5 6	1 7 × 1 7 = 1 49	1 4 × 2 5 = 1 10
5 6 - 1 2 = 1 3	2 7 ×0+9=9	3 5 × 1 21 = 1 35	2 7 ×21=6	14 17 ÷7= 2 17
1÷5- 1 5 =0	4 7 + 4 7 ×6=4	（ 1 8 + 4 8 ）× 4 5 = 1 2	6×5÷ 1 2 =60	1 9 ÷ 1 3 = 1 3
5 9 × 1 5 ÷ 5 9 × 1 5 = 1 25

点评：此题主要考查的是分数加减法、分数乘除法和分数四则混合运算的计算方法．