8.6×0.45+4.8×0.14简便运算？
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8.6×0.45+4.8×0.14
=8.6×0.45+0.48×1.4
=8.6×0.45+0.45×1.4+0.03×1.4
=0.45×（8.6+1.4）+0.042
=0.45×10+0.042
=4.5+0.042
=4.542
=8.6×0.45+0.48×1.4
=8.6×0.45+0.45×1.4+0.03×1.4
=0.45×（8.6+1.4）+0.042
=0.45×10+0.042
=4.5+0.042
=4.542
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