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72X27十72X72十72竖式计算,怎

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原式 =24x72+12x56 =24x72+12x2x28 =24x72+24x28 =24x(72+28) =24x100 =2400

47x72十47x27十47 =47x(72十27+1) =47x100 =4700

2x27十72x72=2x27十(70+2)x72=2x27+2x72+70x72=99x2+70x72=198+5040=5238

原题 = 69 * (72+29-1) = 68*100 = 690

=31x(27+72+1) =31x100 =3100用乘法运算定律计算下面各题27x31十3|x72十31

答:27x72十72x28 =72*(27+28) =72*55 =72*50+72*5 =3600+360 =3960

4.8x72十7.2x52 =4.8×72+72×5.2 =72×(4.8+5.2) =72×10 =720

=36x(72+72+1) =36x145 =5220

=46x7.2十46x2.8 =46x(7.2+2.8) =46x10 =460 希望能帮到你,请采纳正确答案,点击【采纳答案】,谢谢 ^_^ 你的点赞或采纳是我继续帮助其他人的动力!

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