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5/15加2/5加1/2等于多少简算写计算过程.

4/15-(3/5-1/5)+2/5 =4/15-2/5+2/5 =4/15+(2/5-2/5) =4/15

5.5乘[1(2.2—2.15)]简便算 5.5乘[1(2.2—2.15)] =5.5*(1+0.85) =5.5*1.85 = 10.175

用简便方法计算5×1/15加19分之二的和乘19 (5x1/15+2/19)x19 =(1/3+2/19)x19 =19/3+2 =25/3或者8又1/3.

1/5×15+2/3×15=13

十五分之一加五分之三加三分之二 =1/15+3/5+2/3 =1/15+9/15+10/15 =20/15 =4/3 =1又3分之1

5/6减去括号,1/12加上2/15括回 化为数学式子即为5/6-(1/12+2/15) =50/60-(5/60+8/60) =50/60-13/60 =37/60

解:依题意得算式, (2-0.6)÷(5分之1+15分之14) =1.4÷(15分之3+15分之14) =5分之7÷15分之17 =5分之7×17分之15 =17分之21 即(2-0.6)÷(5分之1+15分之14)=17分之21.

13/15+1/2÷(4/5)+3/8 =13/15+5/8+3/8 =13/15+1 =1又13/15 你好,本题已解答,如果满意 请点右下角“采纳答案”。

除以(-1/15)等于 乘以(-15) 7/5 + 2/3 - 1/15 x (-15) = 21/15 + 10 /15 + 1 =31/10 +1 =41/10

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