18乘0.35加2.5乘1.8用简便算式计算
人气:289 ℃ 时间:2019-10-23 03:45:23
解答
18×0.35+2.5×1.8
=1.8×10×0.35+2.5×1.8
=1.8×3.5+1.8×2.5
=1.8×(3.5+2.5)
=1.8×6
=10.8
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