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25x11x28用脱式计算

25x11x4 =25x4x11 =100x(10+1) =100x10+100x1 =1000+100 =1100

原式=2014×78+4028×11 =2014×78+(2014×2)×11 =2014×(78+2×11) =2014×(78+22) =2014×100 =201400

11x9x11+11x11 =11*11*(9+1) =121*10 =1210 如若满意,请点击右侧【采纳答案】,如若还有问题,请点击【追问】 希望我的回答对您有所帮助,望采纳!

2/11x11/6+4/11 =1/3+4/11 =11/33+12/33 =23/33

=162/36×11 =81/18×11 =9/2×11 =99/2 =49.5 前两部可省

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