Elementary Technical Mathematics

Published by Brooks Cole
ISBN 10: 1285199197
ISBN 13: 978-1-28519-919-1

Chapter 1 - Section 1.7 - Addition and Subtraction of Fractions - Exercise - Page 43: 92


1$\frac{1}{4}$ heads

Work Step by Step

Total number of heads of lettuce = 5$\frac{1}{2}$ Heads of lettuce used for sandwiches = 1$\frac{1}{2}$ Heads of lettuce used for salads = 2$\frac{3}{4}$ Remaining heads of lettuce = 5$\frac{1}{2}$ - 1$\frac{1}{2}$ - 2$\frac{3}{4}$ =$\frac{11}{2}$ - $\frac{3}{2}$ -$\frac{11}{4}$ =$\frac{8}{2}$ - $\frac{11}{4}$ = $\frac{8}{2}\times$ $\frac{2}{2}$ - $\frac{11}{4}$ =$\frac{16}{4}$ - $\frac{11}{4}$ =$\frac{5}{4}$ =1$\frac{1}{4}$ heads
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