Question

直接寫出得數(shù)． 3 10 × 5 12 =	1÷ 5 11 =	1 2 ÷60%=
5 12 ×15=	5 6 - 1 2 =	6.8÷10%=
4.5+ 1 2 =	3 8 × 2 3 =	0× 5 12 =
11 5 ÷ 5 11 =

Answer 1

分析：依據(jù)分?jǐn)?shù)四則運算的法則進(jìn)行解答即可，即分?jǐn)?shù)乘法先用分子乘以分子，分母乘以分母，能約分的要先約分再計算；分?jǐn)?shù)除法，除以一個不為0的數(shù)等于乘上這個數(shù)的倒數(shù)，再按分?jǐn)?shù)乘法進(jìn)行計算．

解答：解：

3 10 × 5 12 = 1 8	1÷ 5 11 = 11 5	1 2 ÷60%= 5 6
5 12 ×15= 25 4	5 6 - 1 2 = 1 3	6.8÷10%=68
4.5+ 1 2 =5	3 8 × 2 3 = 1 4	0× 5 12 =0
11 5 ÷ 5 11 = 121 25

點評：此題主要考查分?jǐn)?shù)四則運算的法則的靈活應(yīng)用．