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十点1×89%8点九用简便方法计算

原式 =10.1x89-8.9 =10.1x89-89x0.1 =(10.1-0.1)x89 =10x89 =890 供参考。

101×26.9-1.25×26.9×0.8 =101×26.9-(1.25×0.8)×26.9 =101×26.9-1×26.9 =(101-1)×26.9 =100×26.9 =2690

回答: 86.7*10.1=86.7*10+86.7*0.1 =867+8.67 =875.67

16.8×10.1 =16.8×(10+0.1) =16.8×10+16.8×0.1 =168+1.68 =169.68

8.8×10.1 =8.8*(10+0.1) =8.8*10+8.8*0.1 =88+0.88 =88.88

原式 =44.4x2.3+18.4x11.1+22.2x10.2 =11.1x4x2.3+18.4x11.1+11.1x2x10.2 =11.1x9.2+18.4x11.1+11.1x20.4 =11.1x(9.2+18.4+20.4) =11.1x(27.6+20.4) =11.1x48 =10x48+1x48+0.1x48 =480+48+4.8 =532.8

原式 =3.84x9.6+0.96x61.6 =3.84x9.6+0.96x10x6.16 =3.84x9.6+9.6x6.16 =(3.84+6.16)x9.6 =10x9.6 =96

44.4×2.3+18.4×11.1+22.2×11=11.1×(9.2+18.4+22)=11.1×49.6=550.56

8.92×104-89.2×0.4 =8.92×104-8.92×4 =8.92×(104-4) =8.92×100 =892

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