题目内容
下面各题能用简便计算的要用简便计算.
0.25×32×1.25; 0.37×36+36×0.63; (0.25+1.5)×4.
0.25×32×1.25; 0.37×36+36×0.63; (0.25+1.5)×4.
分析:(1)把32化为4×8,利用乘法结合律简算即可;
(2)(3)根据乘法分配律简算即可.
(2)(3)根据乘法分配律简算即可.
解答:解:(1)0.25×32×1.25
=(0.25×4)×(8×1.25)
=1×10
=10;
(2)0.37×36+36×0.63
=(0.37+0.63)×36
=1×36
=36;
(3)(0.25+1.5)×4
=0.25×4+1.5×4
=1+6
=7.
=(0.25×4)×(8×1.25)
=1×10
=10;
(2)0.37×36+36×0.63
=(0.37+0.63)×36
=1×36
=36;
(3)(0.25+1.5)×4
=0.25×4+1.5×4
=1+6
=7.
点评:此题考查运算定律的运用,熟记运算定律是解决问题的关键.
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