15. Subtract. Reduce the answer if you can.

7⁄12− 1⁄4 Checkmark signature line 7⁄12− 1⁄3 Checkmark signature line

1− 3⁄4 Checkmark signature line 2⁄5− 1⁄10 Checkmark signature line

1− 1⁄6 Checkmark signature line 1⁄2− 1⁄4 Checkmark signature line

16. Add. Reduce the answer if you can.

3⁄4+ 5⁄8 Checkmark signature line 7⁄12+ 5⁄6 Checkmark signature line

9⁄10+ 1⁄10 Checkmark signature line 2⁄5+ 7⁄10 Checkmark signature line

1⁄2+ 11⁄12 Checkmark signature line 5⁄16+ 7⁄8 Checkmark signature line

17. Subtract. Reduce the answer if you can.

1 − 1⁄8 Checkmark signature line 1⁄2− 1⁄12 Checkmark signature line

1⁄2− 1⁄4 Checkmark signature line 2⁄3− 1⁄3 Checkmark signature line

3⁄4− 5⁄8 Checkmark signature line 4⁄5− 7⁄10 Checkmark signature line

18. Multiply. Remember, you can read "of" when you see "x."

3x 1⁄8 Checkmark signature line 1⁄2x 2⁄3 Checkmark signature line

10x 1⁄10 Checkmark signature line 1⁄4x 8⁄8 Checkmark signature line

5x 1⁄2 Checkmark signature line 1⁄3x 9⁄12 Checkmark signature line