Compute.
-$7 \mathrm{lb} 8 \mathrm{oz}$$-4 \mathrm{lb} 1 \mathrm{oz}$
A) $3 \mathrm{lb} 9 \mathrm{oz}$
B) $3 \mathrm{lb} 7 \mathrm{oz}$
C) $11 \mathrm{lb} 7 \mathrm{oz}$
D) $11 \mathrm{lb} 9 \mathrm{oz}$

Question

Quizplus · Accepted Answer

To subtract, convert to ounces: $7 \mathrm{lb} 8 \mathrm{oz} = 120 \mathrm{oz} + 8 \mathrm{oz} = 128 \mathrm{oz}$ and $4 \mathrm{lb} 1 \mathrm{oz} = 64 \mathrm{oz} + 1 \mathrm{oz} = 65 \mathrm{oz}$. Subtract: $128 \mathrm{oz} - 65 \mathrm{oz} = 63 \mathrm{oz}$. Convert back: $63 \mathrm{oz} = 3 \mathrm{lb} 15 \mathrm{oz}$, but since 15 oz is more than a pound, it becomes $3 \mathrm{lb} 7 \mathrm{oz}$.

Compute - 7lb8oz7 \mathrm{lb} 8 \mathrm{oz}7lb8oz −4lb1oz-4 \mathrm{lb} 1 \mathrm{oz}−4lb1oz A) 3lb9oz3 \mathrm{lb} 9 \mathrm{oz}3lb9oz

Compute
- $7 \mathrm{lb} 8 \mathrm{oz}$ $-4 \mathrm{lb} 1 \mathrm{oz}$ A) $3 \mathrm{lb} 9 \mathrm{oz}$