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7.28减2.28乘1.5用简便方法计算

7.28减2.28乘1.5用简便方法计算 =7.28-2.28-2.28x0.5 =5-1.14 =3.86

解: 7.28*5-2.28÷0.2 = 7.28*5-2.28÷(1/5) = 7.28*5-2.28 *5 =(7.28-2.28)*5 =5*5 =25

除以0.2 也就是 乘以 5 7.28×5-2.28÷0.2 =7.28×5-2.28×5 =(7.28-2.28)×5 =5×5 =25

应该是小数点点错了,没有简便算法。 15×7.28-2.28×1.5 =1.5×72.8-2.28×1.5 =1.5×(72.8-2.28) =1.5×70.52 =105.78

7.28*4-2.28/0.25怎么简算 7.28×4-2.28×4 =4×(7.28-2.28) =4×5 =20.

可能你的题目有错 7.28X3.1+7.9X7.28-7.28 =7.28×3.1+7.28×7.9-7.28×1 =7.28×(3.1+7.9-1) =7.28×10 =72.8

7.28-4.8-2.2+6.72 =7.28+6.72-(4.8+2.2) =14-7 =7

7.28x3.1+7.9x7.28-7.28 =7.28x(3.1+7.9-1) =7.28x10 =72.8

用简便方法计算 7.28-2.28×1.5 =7.28-2.28-2.28x0.5 =5-1.14 =3.86

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