1.8X2.5+5.3÷0.4-3.1X2.5简便
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1.8X2.5+5.3÷0.4-3.1X2.5
=1.8X2.5+5.3×2.5-3.1X2.5
=2.5×(1.8+5.3-3.1)
=2.5×4
=10
咨询记录 · 回答于2022-05-03
1.8X2.5+5.3÷0.4-3.1X2.5简便
1.8X2.5+5.3÷0.4-3.1X2.5=1.8X2.5+5.3×2.5-3.1X2.5=2.5×(1.8+5.3-3.1)=2.5×4=10
亲,用乘法分配律
÷怎么换X
5.3÷0.4=5.3÷2/5=5.3×5/2=5.3×2.5
亲,你看下
哦
[比心]