7分之5乘3分之1加7分之2除3 = = = 24.8除5分之2乘4分之1 = = =

分类: 作业答案 • 2021-12-03 12:46:28

问题描述：

答

7分之5乘3分之1加7分之2除3
=5/7x1/3+2/7x1/3
=1/3x(5/7+2/7)
=1/3
24.8除5分之2乘4分之1
=24.8x5/2x1/4
=62x1/4
=15.5