Solve. Simplify the answer.
-A laminated lab bench has $1 \frac { 1 } { 8 }$ inches of plywood, $1 \frac { 1 } { 5 }$ inches of pressed board, and $\frac { 1 } { 2 }$ of an inch of formica. What is the thickness of the lab bench?
A) $\frac { 21 } { 25 } \mathrm { in }$.
B) $1 \frac { 4 } { 21 } \mathrm { in }$.
C) $\frac { 40 } { 113 } \mathrm { in }$.
D) $2 \frac { 33 } { 40 } \mathrm { in }$.

Question

Quizplus · Accepted Answer

To find the total thickness, add the individual thicknesses: $1 \frac { 1 } { 8 } + 1 \frac { 1 } { 5 } + \frac { 1 } { 2 }$. Convert mixed numbers to improper fractions: $\frac { 9 } { 8 } + \frac { 6 } { 5 } + \frac { 1 } { 2 }$. Find a common denominator (40) and add: $\frac { 45 } { 40 } + \frac { 48 } { 40 } + \frac { 20 } { 40 } = \frac { 113 } { 40 }$. Convert back to a mixed number: $2 \frac { 33 } { 40 } $ inches.

Solve Simplify the Answer 1181 \frac { 1 } { 8 }181​

Solve Simplify the Answer $1 \frac { 1 } { 8 }$