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脱式计算(能简算的要简算,并写出主要过程)125×4...

①125×45×16 =(125×8)×(45×2)=1000×90=90000②0.4÷23+1.6÷23 =(0.4+1.6)×32=2×32=3 ③45×27+15÷321 =45×27+15×7=835+4935=5735 ④5.6×38+0.375×5.4-37.5% =5.6×0.375+0.375×5.4-0.375=0.375×(5.6+5.4-1)=0.375×10=3.75 ⑤21-(37+13)×516=21...

(1)3.58-2.36-(2.64-1.42)=3.58-2.36-2.64+1.42=(3.58+1.42)-(2.36+2.64)=5-5=0;(2)(14+16?13)×12=14×12+16×12-13×12=3+2-4=1;(3)3.6×118+8.4÷811=3.6×118+8.4×118=(3.6+8.4)×118=12×118=332;(4)34÷[3.75×(1.2?15)]=34÷[3.75×1...

(1)0.125×0.25×8×4=(0.25×4)×(0.125×8)=1×1=1;(2)54×(56-29 )=54×56-54×29=45-12=33;(3)35×13+35÷113=35×13+35×13=35×(13+13)=35×26=785;(4)8.05-0.75-14=8.05-0.75-0.25=8.05-(0.75+0.25)=8.05-1=7.05.

(1)808×1.25,=(800+8)×1.25,=800×1.25+8×1.25,=1000+10,=1010;(2)8.6×[1÷(12.1-12.09)],=8.6×[1÷0.01],=8.6×100,=860;(3)815+(47?12)×1425,=815+114×1425,=815+125,=4375;(4)912×3.8+15×9.5,=912×(3.8+0.2),=912...

①75×5÷75×5=375÷75×5=5×5=25②(80+4)×125 =80×125+4×125=10000+500=10500③96+480÷96=96+5=101

(1)(125+7)×8,=125×8+7×8,=1000+56,=1056;(2)3.27+6.4+2.73+4.6,=(3.27+2.73)+(6.4+4.6),=6+11,=17;(3)25×44,=25×4×11,=100×11,=1100;(4)6.45-0.58-1.42,=6.45-(0.58+1.42),=6.45-2,=4.45.

(1)310+4.25+3.7+134=310+3.7+4.25+134=(310+3.7)+(4.25+134)=4+6=10;(2)0.125×3.2×25=0.125×8×0.4×25=(0.125×8)×(0.4×25)=1×10=10;(3)17×44+54×17=17×(44+54)=17×98=14;(4)7.8÷〔32×(1-58)+3.6〕=7.8÷〔32×38+3.6〕=7.8...

(1)0.125×0.25×8×4,=(0.125×8)×(0.25×4),=1×1,=1;(2)6.6×12+8×6.6,=6.6×(12+8),=6.6×20,=132;(3)[5-1.7÷(2-1)]×1,=[5-1.7÷1]×1,=[5-1.7]×1,=3.3×1,=3.3;(4)20×2.5÷(10×0.7+3),=20×2.5÷(7+3),=20×2.5÷10,=50...

(1)0.125+3.7×18+18×5.3 =0.125+3.7×0.125+0.125×5.3,=0.125×(1+3.7+5.3),=0.125×10,=1.25;(2)(4.6÷5+0.4×0.2)×2.8=(0.92+0.08)×2.8,=1×2.8,=2.8;(3)910×[59÷(12-16)]=910×[59÷13],=910×53,=32;(4)(2125+1415)×57+13=...

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