70.5×3.7+63×7.05=
分析:70.5×3.7+63×7.05,首先根據(jù)積的變化規(guī)律,將原式轉(zhuǎn)化為:70.5×3.7+6.3×70.5,再運用乘法分配律進(jìn)行簡算.
解答:解:70.5×3.7+63×7.05,
=70.5×3.7+6.3×70.5,
=70.5×(3.7+6.3),
=70.5×10,
=705.
點評:此題考查的目的是理解乘法分配律的意義,掌握積的變化規(guī)律,并且能夠靈活運用乘法分配律進(jìn)行簡便計算.
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