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5/7×16×21/5简便运算.

5/7×16×21/5 = (5/5)×16×(21/7) = 1×16×3 = 48

=5/7x16x21/5 =16x3=48

5/7*16*21/5 =5/7*21/5*16 =3*16 =48

5/16×20/21×1/5的简便计算 =5/16x1/5x20/21 =1/16x20/21 =5/84

5/7X16X21/5 =5/7X21/5X16 =3X16 =48

1-5/7乘25分之21 =1-5/7x21/25 =1-3/5 =2/5 =5分之2 朋友,请及时采纳正确答案,下次还可能帮您,您采纳正确答案,您也可以得到财富值,谢谢。

16×21.5 = 344 竖式

(6/15×2/7×5/3)×21/16 =6/15×2/7×5/3×21/16 =(6/15×5/3)×(2/7×21/16) =2/3×3/8 =1/4

8/21×7/16-8/21×5/16 =8/21×(7/16-5/16) =8/21×1/8 =1/21

4/7×21/10×2/5 =6/5×2/5 =12/25

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