3.78乘7.5减37.8乘0.25的简算怎么算
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答案18.9简便计算 3.78x7.5-37.8x0.25 =3.78x7.5-3.78x2.5 =3.78x(7.5-2.5) =3.78x5 =18.9
咨询记录 · 回答于2022-11-26
3.78乘7.5减37.8乘0.25的简算怎么算
答案18.9简便计算 3.78x7.5-37.8x0.25 =3.78x7.5-3.78x2.5 =3.78x(7.5-2.5) =3.78x5 =18.9
答案18.9简便计算 3.78x7.5-37.8x0.25 =3.78x7.5-3.78x2.5 =3.78x(7.5-2.5) =3.78x5 =18.9
37.8x0.25=3.78x2.5,然后运用乘法分配律的逆运算
同学,能明白吧
乘法分配律的逆运算axb-axc=ax(b-c)