1.6×45%+2+4.5%+0.12×4.5的简便方法
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题目是否为:1.6×45%+2×4.5%+0.12×4.5
如禅如乎果题目橡慎没错方法为:原式=1.6×45%+2+0.1×45%+1.2×45%
=45%×(1.6+0.1+1.2)+2
=45%×2.9+2
=1.305+2=3.305
如果题目为:1.6×45%+贺悉2×4.5%+0.12×4.5 =1.6×45%+0.2×45%+1.2×45 %
=45%×(1.6+0.2+1.2)=45%×3=1.35
如禅如乎果题目橡慎没错方法为:原式=1.6×45%+2+0.1×45%+1.2×45%
=45%×(1.6+0.1+1.2)+2
=45%×2.9+2
=1.305+2=3.305
如果题目为:1.6×45%+贺悉2×4.5%+0.12×4.5 =1.6×45%+0.2×45%+1.2×45 %
=45%×(1.6+0.2+1.2)=45%×3=1.35
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