如题所述
31.2×10.1 直接将10.1当作10+0.1来进行计算,利用乘法分配律拆开来计算,先算31.2x10 然后计算31.2x0.1 最后将两个乘积相加
31.2×10.1 = 31.2×(10+0.1)
=31.2×10+31.2×0.1
=312+3.12
=315.12
31.2×10.1 = 31.2×(10+0.1)
=31.2×10+31.2×0.1
=312+3.12
=315.12
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第1个回答 2022-09-28
解:31.2乘10.1等于( 7878/25 ),【即等于315.12】
∵已知需求出31.2乘10.1等于多少
∴31.2乘10.1
= 31.2 × 10.1
= (31×10+2)/10 × (10×10+1)/10
= 312/10 × 101/10
= 156/5 × 101/10
= 7878/25
= 315.12
答:31.2乘10.1等于7878/25,【即等于315.12】本回答被网友采纳
∵已知需求出31.2乘10.1等于多少
∴31.2乘10.1
= 31.2 × 10.1
= (31×10+2)/10 × (10×10+1)/10
= 312/10 × 101/10
= 156/5 × 101/10
= 7878/25
= 315.12
答:31.2乘10.1等于7878/25,【即等于315.12】本回答被网友采纳
第2个回答 2022-09-28
31.2×10.1
=31.2×(10+0.1)
=31.2x10+31.2x0.1
=312+3.12
=315.2
希望能帮到你!
=31.2×(10+0.1)
=31.2x10+31.2x0.1
=312+3.12
=315.2
希望能帮到你!