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脱式计算能简算的要简算 0.25x32x12.5 5分之2x68+0...

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)12×(12+13-14)=12×12+12×13-12×14=6+4-3=10-3=7;(2)4×0.8×0.25×12.5=(4×0.25)×(0.8×12.5)=1×10=10;(3)2.92×37+4.06÷213=2.92×37+4.06×37=(2.92+4.06)×37=6.98×37=1047350;(4)85.7×25+85.7×74+85.7=85.7×(25+74+1)=85.7×...

①3.7+1.8÷1.5-0.5×0.4 =3.7+1.2-0.2=4.9-1.2=3.7 ②90×113÷13=90×113×113=90169

(1)3411+337+6711=3411+6711+337=10+337=1337;(2)47×2.8+52×2.8+2.8=2.8×(47+52+1)=2.8×100=280;(3)37.6-4.87-1.13=37.6-(4.87+1.13)=37.6-6=31.6;(4)31-[0.5×(6-5.7)+18]=31-[0.5×0.3+18]=31-18.15=12.85;(5)9.3÷[24×(1-3...

解:原式=5.7*30%+3.3**30%+30%=30%(5.7+3.3+1)=30%*10=3

(1)2.87+5.6-0.87+4.4 =(2.87-0.87)+(5.6+4.4)=2+10=12(2)1.25×0.25×32 =1.25×0.25×4×8 =(1.25×8)×(0.25×4)=10×1=10(3)18.5-7.35-2.65=18.5-(7.35+2.65)=18.5-10=8.5(4)68×569=(69-1)×569 =69×569-1×569 =5-569 =46469(5)...

0.25×32×12.5 =0.25×(4×8)×12.5 =(0.25×4)×(8×12.5) =1×100 =100

(1)6.4×1.25×12.5,=8×0.8×1.25×12.5,=(8×1.25)×(0.8×12.5),=10×10,=100;(2)1.7×9.9+0.17,=1.7×9.9+1.7×0.1,=1.7×(9.9+0.1),=1.7×10,=17;(3)[(2+2.8)÷0.6-1.5]×0.04,=[4.8÷0.6-1.5]×0.04,=[8-1.5]×0.04,=6.5×0.04,=0...

4.05÷0.5+10.75 =8.1+10.75 =18.85 你好,本题已解答,如果满意 请点右下角“采纳答案”。

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