SOLUTION: Suppose you buy lunch for the math club. You have enough money to buy 20 salads or 15 sandwiches. The group wants 12 sandwiches. How many salads can you buy

Question 1067261: Suppose you buy lunch for the math club. You have enough money to buy 20 salads or 15 sandwiches. The group wants 12 sandwiches. How many salads can you buy
Answer by KMST(5328) (Show Source): You can put this solution on YOUR website!
THE FIFTH-GRADER REASONING (mental math):
If 20 salads cost as much as 15 sandwiches,
1/5 of that money would be the cost of
4 salads or 3 sandwiches.
If you could have bought 15 sandwiches,
but only need 12, which is 3 less sandwiches,
you could use the money that would pay for those 3 sandwiches
to buy 4 salads.
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