3. On July 1, Mr. Lewis bought a 50-lb. bag of ice-cream salt. On July 15 there were just 11½ lb. left. How much had he used in the two weeks?

4. Grace promised to pick 30 qt. blueberries for her mother. So far she has picked 18½ qt. How many more quarts must she pick?

B

This table of numbers tells what Nell's baby sister Mary weighed every two months from the time she was born till she was a year old.

Weight of Mary Adams
When born73⁄8 lb.
2 months old111⁄4 lb.
4 months old141⁄8 lb.
6 months old153⁄4 lb.
8 months old175⁄8 lb.
10 months old191⁄2 lb.
12 months old213⁄8 lb.

1. How much did the Adams baby gain in the first two months?

2. How much did the Adams baby gain in the second two months?

3. In the third two months?

4. In the fourth two months?

5. From the time it was 8 months old till it was 10 months old?