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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

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

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

4.8x10.1=4.8x(10+0.1)=48+0.48=48.48

题干不清,不能正常作答

9/10×34.5+111×1.8+54.3÷1又9分之1 =0.9×34.5+111×2×0.9+54.3÷9分之10 =0.9×34.5+222×0.9+54.3×0.9 =(34.5+222+54.3)×0.9 =310.8×(1-0.1) =310.8-31.08 =279.72

19.98×37+199.8×1.9+1998×0.44 =19.98×37+19.98×19+19.98×44 =19.98×(37+19+44) =19.98×100 =1998

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