4.7×0.3+0.47×7。 怎么简便运算?
4.7×0.3+0.47×7=4.7×0.3+0.47×10×7÷10=4.7×0.3+4.7×0·7=4.7×(0.3+0.7)=4.7×1=4.7...
4.7×0.3+0.47×7
=4.7×0.3+0.47×10×7÷10
=4.7×0.3+4.7×0·7
=4.7×(0.3+0.7)
=4.7×1
=4.7 展开
=4.7×0.3+0.47×10×7÷10
=4.7×0.3+4.7×0·7
=4.7×(0.3+0.7)
=4.7×1
=4.7 展开
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