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脱式计算,能简算的要简算.0.8×0.25×4×0.5;4.6×[...

先算12.5*8=100*4.36=436 15.2/0.25/4=15.2*(0.25*4)=12.5

(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)50.4×1.9-1.8,=95.76-1.8,=93.96;(2)3.76×0.25+25.8,=0.94+25.8,=26.74;(3)4.8×0.25,=1.2×(4×0.25),=1.2;(4)1.5×105,=1.5×(100+5),=150+7.5,=157.5;(5)1.2×2.5+0.8×2.5,=(1.2+0.8)×2.5,=2×2.5,=5;(6)21.3...

(1)0.75×4×0.25×4,=(0.75×4)×(0.25×4),=3×1,=3;(2)9.6+9.9×99,=(9.9-0.3)+9.9×99,=9.9+9.9×99-0.3,=9.9×(1+99)-0.3,=9.9×100-0.3,=990-0.3,=989.7;(3)6.3×10.1,=6.3×(10+0.1),=6.3×10+6.3×0.1,=63+0.63,=63.63;...

①12.5×0.4×2.5×8=(12.5×8)×(0.4×2.5)=100×1=100②9.5×101=9.5×(100+1)=9.5×100+9.5=959.5③43.2-1.8×3-4.6=43.2-5.4-4.6=43.2-(5.4+4.6)=33.2④4.2×7.8+2.2×4.2=4.2×(7.8+2.2)=4.2×10=42⑤0.87×3.16+4.64=2.7492+4.64=7.3892⑥12.5×4.8=12....

(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...

①1.258×18.5-0.258×18.5,=18.5×(1.258-0.258),=18.5×1,=18.5;②8.48÷0.8×0.9,=10.6×0.9,=9.54;③1.25×2.4,=1.25×8×0.3,=10×0.3,=3;④5.85÷(1.3+0.5)×6,=5.85÷1.8×6,=3.25×6,=19.5.

(1)(0.45×6.38+0.45×3.62)÷0.5=0.45×(6.38+3.62)÷0.5=0.45×10÷0.5=4.5÷0.5=9;(2)59.3×3+38×59.3+59.3×19=59.3×(3+38+19)=59.3×60=3558;(3)8-4.68÷4.5×(0.25+0.5)=8-4.68÷4.5×0.75=8-1.04×0.75=8-0.78=7.22;(4)3.6×[(53.73-1...

脱式计算能简算的要简算 0.25x32x12.5 =(0.25×4)×(8×12.5) =1×100 =100 2/5x68+0.4x32 =0.4×(68+32) =0.4×100 =40 14/5÷(14/5+7/10) =14/5÷7/2 =4/5 (2/3+4/15x5/6)÷10/21 =(2/3+2/9)÷10/21 =8/9÷10/21 =28/15 1-5/8÷25/28-3/10 =1-...

(1)25.4×1.25×0.8=25.4×(12.5×0.8)=25.4×10=254;(2)3.9÷2×(4.94-3.64)=1.95×1.3=2.535;(3)38.4÷0.25÷4=38.4÷(0.25×4)=38.4÷1=38.4;(4)3.47÷(3.47×4 )=3.47÷3.47÷4=1÷4=0.25;(5)1.25×4.6×8=(1.25×8)×4.6=10×4.6=46;(6...

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