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3.8×1.2+18.9÷0.9怎么简便计算

:3.8x1.2+18.9÷0.9 =3.8X1.2+18.9X10/9 =3.8X1.2+21...

=3.8*1.2+18.9/0.9 =3.8*1.2+21 =(4-0.2)*1.2+21 =...

直接是不能简算。 @

18/35÷0.9×2/3 =18/35×10/9×2/3 =8/21 12÷3/10×50% ...

2.9+9×(21-18.1)用简便的方法计算 =2.9+9x2.9 =2.9x(1+9) =...

17.8+17.9+18+18.1+18.2简便计算 17.8+17.9+18+18.1+18.2...

18.9×178+178×2.1-178 =178x(18.9+2.1-1) =178x20 ...

十八点九减十八点九除以一四简便计算 18.9-18.9÷14 =18.9-1.35 =17.5...

(1)100.18-9.6+18.53,=90.58+18.53,=109.11;(2)0.963+...

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