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100+100x100+100+100 要简便计算

(1999x99+2000x100+1999+2000-1900) 简便计算 =(1999x99+1999)+〔2000x100+(2000-1900)〕 =(1999x99+1999x1)+〔2000x100+100〕 =(99+1)x1999+2000x100+100 =100x1999+2000x100+100x1 =(1999+2000+1)x100 运用乘法分配律 =4000x100 =400000 祝...

=99X99+99+100 =99X(99+1)+100 =99X100+100 =(99+1)X100 =100X100 =10000 望采纳

5.3x100+1000x0.17 =5·3x100+100x1·7 =100x(5·3+1·7) =100x7=700

99x(100—1)x99 =99x99x99 =(100-1)(100-1)(100-1) =100x100x100-3x100x100+3x100-1 =1000000-30000+300-1 = 970299

19x4x25+81x100 =19×100+81×100 =(19+81)×100 =100×100 =10000

解: 128ⅹ25x8ⅹ4的简便计算如下: =128x8x(25x4) =125x8x100+3x8x100 =1000x100+2400 =100000+2400 =102400 128ⅹ25x8ⅹ4=102400

简便计算28×(100+2)写脱式: 28x100+28x2 =2800+56 =2856

1.4.8X100.1简算 2.小数乘法的简便运算与整数乘法的简便运算,运用的方法基本一致。 3.运用乘法分配律进行简算 4.计算过程 4.8X100.1 =4.8×(100+0.1) =4.8×100+4.8×0.1) =480+0.48 =480.48

25x64x96 =25x4x16x96 =100x16x96 =1600x96 =1600x(100-4) =1600x100-1600x4 =160000-6400 =153600 99x99+199 =99x99+99+100 =99x(99+1)+100 =99x100+100 =(99+1)x100 =100x100 =10000

简便计算在下面 7.3x100 =7x100+0.3x100 =730

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