题目内容
【题目】
1.25×8÷1.25×8= =
= (1.01﹣0.91)×15=
= =
=
【答案】64;50;;1.5;2;3;.
【解析】
试题分析:(1)根据乘法交换律和结合律进行简算;
(2)根据乘法交换律和结合律进行简算
(3)根据减法的性质进行计算;
(4)先算减法,再算乘法;
(5)先算减法,再算加法;
(6)先算除法,再算加法;
(7)根据分数除法的计算方法进行计算.
解:
(1)1.25×8÷1.25×8,
=(1.25÷1.25)×(8×8),
=1×64,
=64;
(2),
=(×)×(12.5×8),
=×100,
=50;
(3),
=﹣+,
=+﹣,
=1﹣,
=;
(4)(1.01﹣0.91)×15,
=0.1×15,
=1.5;
(5),
=2+,
=2;
(6),
=3+,
=3;
(7),
=×,
=.
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