Answer
$(7$$\times$$10^{3}$$)$$+(1$$\times$$10^{2}$$)$$+(2$$\times$$10^{1}$$)$$+(5$$\times$$10^{0}$$)$
Work Step by Step
First, write 7125 out as an addition problem based on each digits place value.
For example, 7000+100+20+5
Now, add the powers of 10 rule to the numbers expanded above
$(7$$\times$$10^{3}$$)$$+(1$$\times$$10^{2}$$)$$+(2$$\times$$10^{1}$$)$$+(5$$\times$$10^{0}$$)$
