Question

1减6分之1加42分之1加56分之1加72分之1等于几

Answer 1

1减6分之1加42分之1加56分之1加72分之1等于9分之8

Answer 2

1-1/6+1/42+1/56+1/72
=5/6+1/42+1/56+1/72
=6/7+1/56+1/72
=7/8+1/72
=8/9