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53x99x25巧算算式

53×(100-1)×25 =(5300-53)×25 =5247×25 =131175

=53x(100-1) =53x100-53x1 =5300-53 =5247

1. 14x99+14 =14×(99+1) =140 2. 25x32 =25×4×8 =100×8 =800 3. 40x25x35x20 =40×25×700 =1000×700 =700000

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33*99 =33*(100-1) 44*25 =11*4*25 55*27+55*72+55 =55*(27+72+1)

25.8×(99+1)=2580 运用乘法分配律,不懂再问

61x99 =61x(100-1) =61x100-61x1 =6100-61 =6039 25x33x4 =25x4x33 =100x33 =3300 135x54一35x54 =(135-35)x54 =100x54 =5400 125x88 =125x(8x11) =125x8x11 =1000x11 =11000

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