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0.1×45×10×12=?用简便方法计算

0.1×45×10×12 =(0.1×10)×45×(3×4) =1×45×4×3 =180×3 =540 这个方法最简便

(1)1+0.45÷0.9-78=1+0.5-0.875=1.5-0.875=0.625(2)2.5×25-0.12÷13+8.36=1-0.12×3+8.36=1-0.36+8.36=0.64+8.36=9(3)(712+58-1136)×72=712×72+58×72-1136×72=42+45-22=65(4)1.4+(38-0.25)÷114=1.4+(38-14)÷114=1.4+18×45=1.4+110=1....

=3.14×10.1-3.14×0.1 =3.14×(10.1-0.1) =3.14×10 =31.4

28.6x10.1-2.86 解:简便计算 =28.6x10.1-28.6x0.1 =28.6x(10.1-0.1) 乘法分配律 =28.6x10 =286 4.12÷0.25-0.12×4 解:简便计算 =4.12x4-0.12x4 =4x(4.12-0.12) 乘法分配律 =4x4 =16 祝学习进步。

10.1-10.1÷1.01×0.1 =10.1-1×0.1 =10.1-0.1 =10

(1)45.07+(4.93+8.62),=45.07+13.55,=58.62;(2)12.5×(80+0.8),=12.5×80+12.5×0.8,=1000+10,=1010;(3)34.26+47.7-55.3+2.53,=34.26+(47.7+2.53)-55.3,=34.26+50.23-55.3,=84.49-55.3,=29.19;(4)13.2-180÷45×2.6,=13.2...

4.3×10.1 =4.3*(10+0.1) =4.3*10+4.3*0.1 =43+0.43 =43.43

(1)0.8÷(45×1.25)÷(0.64?125+1.2×0.5÷45)=0.8÷(0.8×1.25)÷(0.64-0.04+0.6÷0.8),=0.8÷1÷(0.6+0.75),=0.8÷1.35,=1627;(2)51+112?256+3712?4920+51130?61342+…-10020110100.=51+(1+12)-(2+56)+(3+712)-(4+920)+…+(100+2011...

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