Question

先看清左右兩題之間的關(guān)系，再寫出得數(shù)． 1 6 × 1 5 =	1 6 ÷5=	2 5 × 1 2 =
2 5 ÷2=	7 13 × 1 7 =	7 13 ÷7=
3 4 × 1 7 =	3 4 ÷7=

Answer 1

分析：根據(jù)分數(shù)乘除法的計算方法進行解答即可．

解答：解：

1 6 × 1 5 = 1 30	1 6 ÷5= 1 30	2 5 × 1 2 = 1 5
2 5 ÷2= 1 5	7 13 × 1 7 = 1 13	7 13 ÷7= 1 13
3 4 × 1 7 = 3 28	3 4 ÷7= 3 28

點評：此題考查了分數(shù)乘除法的口算能力，除以一個數(shù)等于乘以這個數(shù)的倒數(shù)．