Question

42(6/5-7/1)简便计算方法

42(6/5-7/1)简便计算方法

Answer 1

42X(5/6-1/7)
=42X5/6一42X1/7
=7X5一6X1
=35一6
=29

追答

注意:
6分之5写作:5/6
7分之1写作:1/7

Answer 2

42×(6/5-1/7)
=42×5/6-42×1/7
=35-6
=29