(1)18乘以(6分之5+9分之7)
=18×5/6+18×7/9
=15+14
=29
(2)0.625除以7分之5加5分之7乘以8分之3
=(0.625+3/8)×7/5
=1×7/5
=1.4
(3)4分之1除以4分之7加4分之1乘以7分之3
=1/7+3/28
=1/4
(1)18乘以(6分之5+9分之7)
=18×5/6+18×7/9
=15+14
=29
(2)0.625除以7分之5加5分之7乘以8分之3
=(0.625+3/8)×7/5
=1×7/5
=1.4
(3)4分之1除以4分之7加4分之1乘以7分之3
=1/7+3/28
=1/4