Question: Heather is going to sew 150 aprons that are to be used for a kiddie crew program. She already was able to sew 13 aprons, and today, she sewed three times as many aprons. How many aprons should she sew tomorrow if she wants to sew half of the remaining number of aprons needed?
Answer: Heather has sewn 13 x 3 = 39 aprons today. The total number of aprons sewn is 13 + 39 = 52. Heather needs to sew 150 - 52 = 98 aprons more. So, she needs to sew 98 / 2 = 49 aprons tomorrow. The answer is 49.

Question: If 3 boys each make 12 muffins for a bake sale, and 2 other girls are making 20 muffins each, how many total muffins will be for sale?
Answer: The boys baked a total of 3 x 12 = 36 muffins. The girls baked a total of 2 x 20 = 40 muffins. Hence, there are a total of 36 + 40 = 76 muffins that will be for sale. The answer is 76.

Question: Mark bought 2 pounds of tomatoes for $5 per pound and 5 pounds of apples, at $6 per pound. How much did he spend in total?
Answer: Mark bought 2 pounds of tomatoes for $5 / pound * 2 pounds = $10. Mark bought 5 pounds of apples for $6 / pound * 5 pounds = $30. Now add those two quantities to find Mark's total spending: $30 + $10 = $40. The answer is 40.

Question: Trey is hanging wall decorations around his house. He uses a nail for each of two-thirds of them, a thumbtack for each of two-fifths of the rest, and a sticky strip for each of the other decorations. He used 15 sticky strips. How many nails did Trey use?
Answer:
Trey used 15 sticky strips for 3 / 5 of the remaining decorations after using nails, so he used 15 *  / 3 / 5 = 25 thumbtacks and sticky strips. The 25 decorations were 1 / 3 of the total decorations, so he used 25 / 1 / 3 = 75 total decorations. The nails were 2 / 3 of the decorations, so Trey used 75 decorations * 2 / 3 = 50 nails. The answer is 50.