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(4.8×7.5×8.1)÷(2.4×2.5×2.7)

(4.8×7.5×8.1)÷(2.4×2.5×2.7) =(4.8÷2.4)x(7.5÷2.5)x(8.1÷2.7) =2x3x3 =18

(4.8×7.5×8.1)÷(2.4×2.5×2.7) =(2.4×2×2.5×3×2.7×3)÷(2.4×2.5×2.7) =(2.4×2.5×2.7×2×3×3)÷(2.4×2.5×2.7) =(2.4×2.5×2.7×18)÷(2.4×2.5×2.7) =18

(4.8×7.5×8.1)÷(2.4×2.5×2.7) =(4.8÷2.4)×(7.5÷2.5)×(8.1÷2.7) =2×3×3 =18

8201.5

=4.8/2.4*7.5/2.5*8.1/2.7 =2*3*3 =18

改一下顺序就好了

4.8/2.7*7.5/2.4*8.1/2.5 既然都是乘除法,那可以任意掉换位置。 4.8/2.4*7.5/2.5*8.1/2.7 再用集合律 2*3*3=18

原式 =4.5x11.1x4.8÷3.33÷0.8÷0.9 =(4.5÷0.9)x(11.1÷3.33)x(4.8÷0.8) =5x10/3x6 =5x20 =100 供参考。

(1)83.72-(75-16.28),=83.72-75+16.28,=(83.72+16.28)-75,=100-75,=25;(2)1998+199.8+19.98+1.998+2.222,=(2000-2)+(200-0.2)+(20-0.02)+(2-0.002)+2.222,=2222-2.222+2.222,=2222;(3)[4.8-4.8×(3.2-2.7)]÷0.24,=...

1.2乘(2.5除2.4)乘4.8+0.8乘5 = (1.2乘2.5)乘(4.8除2.4)+0.8乘5 = 3乘2 + 4 = 6 + 4 = 10

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