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138乘25乘4的简便方法 脱式计算

(138十63)十237 =138+(63+237) =138+300 =438

13.8x0.45+138x0.055 =13.8x0.45+13.8x0.55 =13.8x(0.45+0.55) =13.8x1 =13.8

138÷6+35×7 =23+245 =268

(138+142+158+150+152+158)÷5 =[(138+152)+(142+158)+(150+158)]÷5 =(290+300+308)÷5 =898÷5 =179.6

838-[(138-88)÷25]用脱式计算 =838-(50÷25) =838-2 =836

138+499=138+(500-1) =138+500-1 =638-1 =637

376+138-269 =514-269 =245 脱式计算,即递等式计算,把计算过程完整写出来的运算,也就是脱离竖式的计算。在计算混合运算时,通常是一步计算一个算式(逐步计算,等号不能写在原式上),要写出每一步的过程。一般来说,等号要往前,不与第一行对...

(932一138)亠8脱式计算 解: (932一138)÷8 =794÷8 =99.25

408-12×24 = 408 - 288 = 120 (46+28)×60 = 74 x 60 = 4440 42×50-17 = 2100- 17 = 2083 32+105÷5 = 32 + 21 = 53 420×(327-238) = 420 x 89 = 37380 (4121+2389)÷7 = 6510 ÷7 = 930 3.416÷(0.016×35) = 3.416 ÷0.56 = 6.1 0.8×[(10...

138+666÷3 =138+222 =360

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