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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...

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.

如图

(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...

(9.3×3.4+3.4×10.7)÷0.07 =[3.4×(9.3+10.7)]÷0.07 =[3.4×20]÷0.07 =68÷0.07 =6800/7

(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.

7.2+28.7÷0.7 =7.2+41 =48.2 没有简算,直接计算

(1)(1.7+0.8)÷1.25×0.8=2.5÷1.25×0.8=2×0.8=1.6;(2)32.55-14.64-6.36+7.45=(32.55+7.45)-(14.64+6.36)=40-21=19;(3)(3.72+0.48)÷[(2-0.6)×1.5]=4.2÷[1.4×1.5]=4.2÷2.1=2;(4)38×2.8-2.8+2.8×63=(38-1+63)×2.8=100×2.8=280...

(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.

(1)2.8×7.6+1.4×2.8+2.8=2.8×(7.6+1.4+1)=2.8×10=28;(2)70.8-0.8×0.5=70.8-0.4=70.4;(3)13-3.79-6.21=13-(3.79+6.21)=13-10=3;(4)5×(40+0.7)=5×40+5×0.7=200+3.5=203.5;(5)4.12-1.78-1.22=4.12-(1.78+1.22)=4.12-3=1.12;...

(1)7.29×4.6+46×1.271,=7.29×4.6+4.6×12.71,=(7.29+12.71)×4.6,=20×4.6,=92;(2)(28.7-18.6÷3.1)×0.8,=(28.7-6)×0.8,=22.7×0.8,=18.16;(3)16-5.32-4.68,=16-(5.32+4.68),=16-10,=6;(4)40.8+14.7÷(14.6-12.5),=40...

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