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54点吧5减括号4.13加4.85括号用简便竖式计算

54.85-(4.13+4.85) =(54.85-4.85)-4.13 =50-4.13 =45.87

∵54.4÷4=13.6 ∴4×13.6=54.4

54.3-12.19+25.7-17.81 =(54.3+25.7)-(12.19+17.81) =80-30=50

35.37+(4.63-1.28) 解:简便计算 =35.37+4.63-1.28 =40-1.28 =38.72 祝学习进步。

您好: -2/5+(3/8-1/6+7/12)x(-2.5) =-2/5-(9/24-4/24+14/24)x5/2 =-2/5-19/24x5/2 =-2/5-95/48 =-96/240-475/240 ...

三十点二减括号四点八六加七点五四 =30.2-(4.87+7.54) =30.2-4.87-7.54 =17.2+5+8-4.87-7.54 =17.2+5-4.87+8-7.54 =17.2+(5-4.87)+(8-7.54) =17.2+0.13+0.46 =17.33+0.46 =17.79

解:题意及过程如下: 32.6×54.9+41.5×67.4+67.4×13.4 =32.6×54.9+(41.5+13.4)×67.4 =32.6×54.8+54.9×67.4 =(32.6+67.4)×54.9 =100×54.9 =5490 希望能帮到你!

薇薇一笑倾城

45.5-(6.87+15.55) =45.5-22.42 =23.08

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