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7.6乘99列竖式计算

7.6x99 =7.6x(100-1) =7.6x100-7.6 =760-7.6 =752.4

768×99=76032 竖式计算如下

76×99=7524

17×99 =17x(100-1) =17x100-17 =1700-17 =1683 朋

0.999 X 99 8991 8991 98.90

91乘99列竖式 91x99=9009

列竖式计算 1.2699+1.26 =1.26×(99+1) =1.26×100 =126

2.73×99的简便计算的过程是: 2.73×99 =2.73×(100-1) =2.73×100-

99×7/8 =99×(1-1/8) =99-(96+3)×1/8 =99-(12+3/8)

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