When squaring fractions, both the numerator and the denominator are squared:
12. (4/5)² = 16/25
13. (-5/12)² = 25/144
14. (13/6)² = 169/36
To solve 2890-2345 without a calculator do the following either in your head or on paper:
2890
<u>-2345
</u> 0545
** Remember to carry over **
Hope this helps!