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括号4.8×7.5×8等于1括号除以括号2.4×2.5×2.7括号递...

括号4.8×7.5×8等于1括号除以括号2.4×2.5×2.7括号递等式计算 括号4.8×7.5×8等于1括号除以括号2.4×2.5×2.7括号 =(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

括号4.8÷7.5+4.8÷2.5括号除以0.16 (4.8×15/2+4.8×5/2)÷4/25 =(36+12)×25/4 =48×25/4 =300

7.5÷(3.7-1.2)×0.8 =7.5÷2.5×0.8 =3×0.8 =2.4

6.25(Ⅹ-3)÷2=7.5 解: 6.25(X-3)=7.5x2 X-3=15÷6.25 X=2.4+3 X=5.4

用简便计算 7.5÷(3.7-1.2)×0.8 =7.5÷2.5×0.8 =3×0.8 =2.4

2.5+7.5-(-1.3)=2.5+(7.5+1.3)=12.7-(1.4)

(9.1×4.8×7.5)÷0.25+1.3×1.6 =(9.1x4.8x7.5)÷1/4+1.3×1.6 =(9.1x4.8x7.5)x4+1.3×1.6 =9.1x4.8x7.5x4+1.3×1.6 =1.3x7x1.6x3x3+1.3x1.6 =1.3x1.6x(7x9+1) =1.3x1.6x64 =133.12

解: 原式 =(7.5-1)÷1/4 =6÷1/4 =6x4 =24

这两道题都可以通过基本的列式来回答。 7.5×4/25= 15/2 × 4/25 =6/5 4.5÷5/9 =81/10 所以第一空答案为6/5(或1.2),第二空答案为81/10(或8.1)

7.5×[63÷(7÷25)] =7.5×(63÷7×25) =7.5×(9×25) =7.5×225 =1687.5

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