On Tuesdays, Jodi brings her laptop, supply case, two notebooks, and two textbooks in her backpack. On Fridays, Jodi only packs her binder and supply case. How much less does Jodi’s full backpack weigh on Friday than it does on Tuesday?

12 lb − 4 oz =

1 lb − 13 oz =

11 oz + 5 oz = __ lb

89 lb 2 oz − 16 lb 4 oz = __ lb __ oz

23 lb 1 oz − 15 oz = __ lb __ oz

On Mondays, Jodi packs only her laptop and supply case into her backpack. How much does her full backpack weigh?

12 lb − 8 oz = ___ lb ____ oz

3 lb 9 oz + 9 oz

125 lb 2 oz − 12 lb 3 oz =

5 lb 8 oz + 9 oz = __ lb __ oz

21 lb 8 oz + 6 lb 9 oz = __ lb __ oz