Lower Elementary:
Question: Laura has a heart-shaped necklace charm that breaks into two pieces. If the whole charm weighs
51/2 grams and one of the pieces weighs 21/2 grams, then how much does the other piece weigh?
Answer: 3 grams
Solution: To find the weight of the missing part of the charm, we subtract 21/2 grams from 51/2 grams. We can do this by splitting 21/2 grams into 2 grams and 1/2 of a gram. If we subtract 2 grams first, we get 51/2 – 2 = 31/2 grams. Next, we subtract the half to get 31/2 – 1/2 = 3 grams. So, the missing part of the charm weighs 3 grams.
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