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7.2x0.15怎么算

7.2×0.15 =7.2×0.5×0.3 =3.6×0.3 =1.08

15.7x0.2一5.7x0.2 =(15.7-5.7)×0.2 =10×0.2 =2

7.38x0.5x20-2.15这道题怎么简算 =0.5x20x7.38-2.15 =10x7.38-2.15 =73.8-2.15 =71.65

(x+0.3)÷2=7.15 x+0.3=7.15×2 x+0.3=14.3 x=14.3-0.3 x=14

=(2x3x2)x(3x7)x(5x3x3)x(2x5.1) 除以 (3x5)x(2x2)x0.7x51 =54

7/15x=2-0.6 7/15x=1.4 x=1.4x15/7 x=3

2(x➕1)➕7=15 解 2x➕2➕7=15 2x=15➖7➖2 2x=6 x=3

15%x=3 15x=300 x=300/15=20 34%x+7=24 34%x=24-7=17 2%x=1 x=5 180%x÷0.5=7.2÷0.5 180%x=7.2 1.8x=7.2 x=4 10.7+20%x=18.7 10.7+0.2x=18.7 0.2x=18.7-10.7=8 x=8/0.2=40 x-85%x=1.2 x-0.85=1.2 0.15x=1.2 x=1.2/0.15=8 2.5x=3÷0.3 2.5x=10 x=10...

3.7x0.15+2.1x0.45 =3.7*0.15+2.1*3*0.15 =3.7*0.15+6.3*0.15 =(3.7+6.3)*0.15 =10*0.15 =1.5 答案一定是对的,不懂来问我。

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