Question

八十分之二加一百二十分之二加一百六十八分之二加二百二十四分之二怎么算

Answer 1

八十分之二加一百二十分之二加一百六十八分之二加二百二十四分之二怎么算
80=8x10
120=10x12
168=12x14
224=14x16
八十分之二加一百二十分之二加一百六十八分之二加二百二十四分之二
=(1/8-1/10)+(1/10-1/12)+(1/12-1/14)+(1/14-1/16)
=1/8-1/16
=1/16

Answer 2

八十分之二加一百二十分之二加一百六十八分之二加二百二十四分之二
=(1/8-1/10)+(1/10-1/12)+(1/12-1/14)+(1/14-1/16)
=1/8-1/16
=1/16

Answer 3

=1/40+1/60+1/84+1/112
=3/120+2/120+1/84+1/112
=5/120+1/84+1/112
=1/24+1/84+1/112
=7/168+2/168+1/112
=9/168+1/112
=3/56+1/112
=6/112+1/112
=7/112
=1/16

Answer 4