Question

Nia made some warm salt water help her her sore throat. She mixed 1 teaspoon salt with 3 cups water. Nia’s mom wanted to make more salt water for her. She measured out 5 cups of water from the faucet. How much salt does she need to add so that the water tastes the same as the original

Answer 1

5/3 teaspoons (if you don't want an improper fraction, it's 1 2/3 teaspoons)

Explanation:

If she uses 1 tsp for 3 cups, then the amount needed for one cup is 1/3 tsp.

Since the mother is using 5 cups, just multiply 1/3 by 5, which equals 5/3.