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4.56×0.27+483×0.0456+1.9×4.56+0.456×30=
45.6
45.6
分析:先把各个乘法算式变成都含有因数4.56,再运用乘法分配律简算.
解答:解:4.56×0.27+483×0.0456+1.9×4.56+0.456×30,
=4.56×0.27+4.83×4.56+1.9×0.456+4.56×3,
=4.56×(0.27+4.83+1.9+3),
=4.56×10,
=45.6;
故答案为:45.6.
点评:简算时看到此类“几个乘法相加减”的题,先观察这几个乘法有没有相同因数,或者能不能转化出相同因数.
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