Question

负105又9分之5乘中括号负5分之3反括号？

Answer 1

负105又9分之5乘中括号负5分之3反括号。就一个括号，中括号，小括号都一样。
-105又5/9x(-3/5)
=105x3/5+5/9x3/5
=63+1/3
=63又1/3

Answer 2

-105又5/9x[-3/5]
=105又5/9x3/5
=(105+5/9)x(3/5)
=(105)x(3/5)+(5/9)x(3/5)
=63+1/3
=63又1/3。