Q: Big boxes contain 7 dolls each. Small boxes contain 4 dolls each. There are 5 big boxes and 9 small boxes. How many dolls are there in total?
A: There are 7 * 5 = 35 dolls in the big boxes. There are 4 * 9 = 36 dolls in the small boxes. There are 35 + 36 = 71 dolls altogether. The answer is 71.

Q: Cathy has $12 left in her wallet. Her dad sent her $25 for her weekly consumption while her mom sent her twice the amount her dad sent her. How much money does Cathy have now?
A: Cathy has $12 + $25 = $37 after his father sent him money. Her mom sent her $25 x 2 = $50. Therefore, Cathy has $50 + $37 = $87. The answer is 87.

Q: Jackie walks 2 miles each day while Jessie walks 1.5 miles each day. How many more miles, in all, does Jackie walk than Jessie walk in 6 days?
A:
Jackie walks 2 - 1.5 = 0.5 miles more each day than Jessie. So in 6 days, Jakie walks 0.5 x 6 = 3 miles more than Jessie. The answer is 3.