Question

Sandra needs 2 3/4 cups of flour for one kind of cookie and 3 3/8 cups for another kind. how much would she need for both kinds?

Answer 1

2 6/8 plus 3 3/8 = 5 9/8= 6 1/8

Answer 2

Answer:

$Total\ flour\ sandra\ needs\ \frac{49}{8}\ cups.$

Step-by-step explanation:

As given

$Sandra\ needs\ 2 \frac{3}{4}\ cups\ of\ flour\ for\ one\ kind\ of\ cookie\ and\ 3 \frac{3}{8}\ cups\ for\ another\ kind.$

i.e

$Sandra\ needs\ \frac{11}{4}\ cups\ of\ flour\ for\ one\ kind\ of\ cookie\ and\ \frac{27}{8}\ cups\ for\ another\ kind.$

$Total\ flour\ sandra\ needs = \frac{11}{4} + \frac{27}{8}$

L.C.M of (4,8) = 8

$Total\ flour\ sandra\ needs = \frac{11\times 2 + 27}{8}$

$Total\ flour\ sandra\ needs = \frac{22+ 27}{8}$

$Total\ flour\ sandra\ needs = \frac{49}{8}\ cups$

$Total\ flour\ sandra\ needs\ \frac{49}{8}\ cups.$