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

`Total\ flour\ sandra\ needs\ (49)/(8)\ cups.`

Explanation:

As given

`Sandra\ needs\ 2 (3)/(4)\ cups\ of\ flour\ for\ one\ kind\ of\ cookie\ and\ 3 (3)/(8)\ cups\ for\ another\ kind.`

i.e

`Sandra\ needs\ (11)/(4)\ cups\ of\ flour\ for\ one\ kind\ of\ cookie\ and\ (27)/(8)\ cups\ for\ another\ kind.`

`Total\ flour\ sandra\ needs = (11)/(4) + (27)/(8)`

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

`Total\ flour\ sandra\ needs = (11* 2 + 27)/(8)`

`Total\ flour\ sandra\ needs = (22+ 27)/(8)`

`Total\ flour\ sandra\ needs = (49)/(8)\ cups`

`Total\ flour\ sandra\ needs\ (49)/(8)\ cups.`