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12.6×7.6×2.32÷1.9÷1.4÷2.9用简便方法怎样运算

原式 =(12.6÷1.4)x(7.6÷1.9)x(2.32÷2.9) =9x4x0.8 =36x0.8 =28.8 供参考。

原式=(12.6÷1.4)×(7.6÷1.9)×(2.32÷2.9) =9×4×0.8 =36×0.8 =28.8 望采纳,谢谢

=12.6/1.4*(7.6/1.9)*(2.32/2.9) =9*4*0.8 =36*0.8 =144/5=28.8

=4.06+28.8 =32.86

(1)原式=0.67+4.32 =4.99 (2)原式=4.2÷0.3 =14 (3)原式=5.5×0.25×(1+0.4) =1.925 (4)原式=1.25×8×2.47 =24.7 (5)原式=27×(10+0.2) =275.4 (6)原式=4.8×(3.8+6.2) =48

(1)2.144÷3.2+4.32 =5.36÷8+4.32 =0.67+4.32 =4.99. (2)9.66÷2.3÷0.3 =32.2÷2.3 =14. (3)5.5×0.25×1.4 =5.5×0.35 =1.925. (4)27×10.2=275.4.

解:4÷7-47=0 1.68+1.5=3.18 7÷1.4=5 13÷2÷13=0.5 32÷53×0=0 23×2÷23×12=1 (0.18+0.9)÷9=0.12 0.36÷3.6%=10 10.1-1=9.1 9+29=929 0.9+99×0.9=90 2.6-1.7=0.9

(1)1÷4÷8÷0.25÷12.5=1÷(4×8×0.25×12.5)=1÷[(4×0.25)×(8×12.5)]=1÷(1×100)=1÷100=0.01 (2)9.75﹣5.42﹣(0.25+2.58)=9.75﹣5.42﹣0.25﹣2.58=(9.75﹣0.25)﹣(5.42+2.58)=9.5﹣8=1.5 (3)8 ×2.7+6.2×1.4+3.5×8.6=8.6×2.7+6.2×1...

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