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7.6×1.9

76×1.9+7.6×81的简便算法 76×1.9+7.6×81 =7.6*19+7.6*81 =7.6*(19+81) =7.6*100 =760

解:采用结合律, 原式=7/9-(1/6-2/9) =7/9-1/6+2/9 =(7/9+2/9)-1/6 =1-1-6 =5/6

7.6×1.9-96.2÷7.4的简便运算 7.6×1.9-96.2÷7.4 =14.44-13 =1.44

5/9x6/7-1/9÷7/6 =5/9x6/7-1/9x6/7 =(5/9-1/9)x6/7 =4/9x6/7 =8/21

6/7一6/7x(9/3+1/9)脱式,怎么算 解: 6/7一6/7x(9/3+1/9) =6/7-6/7×28/9 =6/7-2/3 =4/21

7.6×1.9-96.2÷7.4 =14.44-13 =1.44

解: 7/9-(1/6+7/8) =7/9-(4/24+21/24) =7/9-25/24 =56/72-75/72 =-19/72 =-72分之19 从9分之7减去6分之1和8分之7的和,...

7.6÷4=1.9

用1,6,7,9算24点,共有4种算法。 ﹙9-6﹚×﹙7+1﹚ ﹙9-6﹚×﹙1+7﹚ ﹙1+7﹚×﹙9-6﹚ ﹙7+1﹚×﹙9-6﹚

 3.6×7.6×9.3÷(1.9×3.1×1.8)=3.6/1.8*9.3/3.1*7.6/1.9=24

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