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1.2×5.2一2.5÷0.3用简便方法计算

1.2×5.2一2.5÷0.3 =1.2x(5+0.2)-(2.4+0.1)÷0.3 =1.2x5+1.2x0.2-2.4÷0.3-0.1÷0.3 =0.3x4x5+0.24-8-1/3 =0.3x20+0.24-8-1/3 =6+0.24-8-1/3 =-2+0.24-1/3 ≈-2+0.24-0.34 =-2-0.1 =-2.1

1.2乘5.2减2.5除0.3简便计算 1.2乘5.2减2.5除0.3 =1.2*5.2-2.5÷0.3 =6.24- 2.5÷0.3 结果不是有限小数 核实算式

1.2×(5.2-2.5)÷0.3的脱式答案 解: 1.2×(5.2-2.5)÷0.3 =1.2x2.7÷0.3 =3.24÷0.3 =10.8

2.5×〔(2.35-1.66)÷0.3〕 =2.5x(0.69÷0.3) =2.5x2.3 =2.5x(2+0.3) =2.5x2+2.5x0.3 =5+0.75 =5.75 谢谢,请采纳

1÷(0.8+1.2÷3/5) =1÷(0.8+1.2÷0.6) =1÷(0.8+2) =1÷2.8 =1÷5分之14 =14分之5

答:原式=5×2-1/2=19/2

1.25×2.3÷0.5+1.2的计算方法是什么 =1.25÷0.5×2.3+1.2 =2.5×2.3+1.2 =5.75+1.2 =6.95

2.2 解析: 2.5×0.3+1.2+0.25 =0.75+1.2+0.25 =(0.75+0.25)+1.2 =1+1.2 =2.2

(0.1x-0.2)÷0.2-(x+0.1)÷0.5=0.3 解:0.5x-1-2x-0.2=0.3 2x-0.5x=-1-0.2-0.3 1.5x=-1.5 x=-1

3.6÷0.4-1.2×5 =3.6÷2/5-1.2×5 =3.6×5/2-1.2×5 =1.8×5-1.2×5 =5×(1.8-1.2) =5×0.6 =3

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