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用递等式计算,怎样算简便就怎样算:①8.4×0.26+0.7...

(1)5.6×0.85×7.8=4.76×7.8=37.128;(2)4.32×99+4.32=4.32×(99+1)=4.32×100=432;(3)99×3.74=(100-1)×3.74=100×3.74-3.74=374-3.74=370.6;(4)1.25×3.2×0.25=1.25×8×0.4×0.25=(1.25×8)×(0.4×0.25)=10×0.1=1;(5)1.2×2.6+3×4.25...

7×24+72 =7x24+3x24 =24(7+3) =24x10 =240

(1)2506-10517÷13+14×106,=2506-809+1484,=1697+1484,=3181;(2)[0.8+0.75×(0.65-0.25)]÷0.01,=[0.8+0.75×0.4]÷0.01,=[0.8+0.3]÷0.01,=1.1÷0.01,=110;(3)455×7.6+112÷ 5 38 +43.3×76,=455×7.6+112×7.6+433×7.6,=(455+112+43...

0.25×3.7×0.4递等式: 0.25×3.7×0.4 =0.25x0.4x3.7 =0.1x3.7 =0.37

①13×105-1890÷18=1365-105=1260②1.25×( 0.8+19.2÷0.24 )=1.25×(0.8+80)=1.25×0.8+1.25×80=1×100=100③716×9-7÷167=6316-4916=78④514÷[(56-38)×1011]=514÷[(2024?924)×1011]=514÷[1124×1011]=514×125=67

①28.49÷7.4×0.32=3.85×0.32=1.232;②(514÷1.25+112)×13-0.975=(4.2+1.5)×13-0.975=5.7×13-0.975=1.9-0.975=0.925;③(0.2+13)÷23÷0.6=815×32×53=43;④[(615-0.45)÷1518]÷(113÷6)=[234÷1518]÷29=92×92=814.

(1)12.5×(0.7×0.8),=12.5×0.8×0.7,=10×0.7,=7;(2)70.8-0.8×0.5,=70.8-0.4,=70.4;(3)13-3.79+6.21,=9.21+6.21,=15.42;(4)12.5×(40+0.7),=12.5×8×5+12.5×0.7,=500+8.75,=508.75;(5)4.12-1.78-1.22,=4.12-(1.78+1.2...

7.2+28.7÷0.7 =7.2+41 =48.2 没有简算,直接计算

9.6÷0.4×0.25,=24×0.25,=0.25×4×6,=6;8.68-8.68÷0.56×0.5,=8.68-8.68×(0.5÷0.56),=8.68×(1-0.5÷0.56),=8.68×0.06÷0.56,=8.68× 3 28 ,=0.93;29.7÷(5.85÷0.65),=29.7÷9,=3.3;1.25×3.2×0.8,=(1.25×0.8)×3.2,=1×3.2,=3.2;...

(1)3.97+0.7-1.32,=4.67-1.32,=3.35;(2)30-(3.8+0.75),=30-4.55,=25.45;(3)75.6-(14.3-8.3),=75.6-6,=69.6;(4)65+32×4,=65+128,=193;(5)(47+33)×13,=80×13,=1040;(6)(132-17)÷(31-8),=115÷23,=5.

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