Edward had $17.80 to spend at the toy store. He bought 4 toy cars that cost $0.95 each and a race track that cost $6.00. How much money does Edward have left to buy more toys? Give the rationale and then the answer.
Let's think step by step. The cost of the toy cars is 4 × $0.95 = $3.80. The total cost of the toys is $3.80 + $6.00 = $9.80. Edward has $17.80 − $9.80 = $8.00 left.. The answer is: 8.

Sonny received 45 boxes of cookies from his friend yesterday. He gave 12 to his brother, 9 to his sister, and he gave 7 to his cousin. How many boxes of cookies were left for him? Give the rationale and then the answer.
Let's think step by step. Sonny gave 12 + 9 + 7 = 28 boxes of cookies. Therefore, he was left with 45 - 28 = 17 boxes of cookies.. The answer is: 17.

Jimmy and Irene go shopping for clothes on a Tuesday, where senior citizens get a 10% discount on their purchases. Jimmy picks out 3 shorts from the $15 rack. Irene grabs 5 shirts from the $17 rack. How much money do they give to the cashier? Give the rationale and then the answer.
Let's think step by step. Jimmy’s shorts cost 3 x $15 = $45. Irene’s shirts cost 5 x $17 = $85. Total cost for the clothes is $45 + $85 = $130. 10% discount on the clothes is $130 x 10% = $13. They give the cashier $130 - $13 = $117.. The answer is: 117.