题目内容
(1)4.6×3.7+54×0.37;
(2)0.125×344-6.7×1.25-12.5%.
(2)0.125×344-6.7×1.25-12.5%.
分析:(1)先变形为46×0.37+54×0.37,再根据乘法分配律简便计算;
(2)先变形为0.125×344-67×0.125-0.125,再根据乘法分配律简便计算.
(2)先变形为0.125×344-67×0.125-0.125,再根据乘法分配律简便计算.
解答:解:(1)4.6×3.7+54×0.37
=46×0.37+54×0.37
=(46+54)×0.37
=100×0.37
=37;
(2)0.125×344-6.7×1.25-12.5%
=0.125×344-67×0.125-0.125
=0.125×(344-67-1)
=0.125×276
=34.5.
=46×0.37+54×0.37
=(46+54)×0.37
=100×0.37
=37;
(2)0.125×344-6.7×1.25-12.5%
=0.125×344-67×0.125-0.125
=0.125×(344-67-1)
=0.125×276
=34.5.
点评:考查了运算定律与简便运算,四则混合运算.注意运算顺序和运算法则,灵活运用所学的运算定律简便计算.
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