Answer this question:Joe goes camping with his dad on a Friday. Joe's dad has 21 marshmallows, and Joe has four times as much marshmallows as his dad. If Joe’s dad roasts a third of his marshmallows, and Joe roasts half of his marshmallows, how many marshmallows did they roast in total?
Joe’s dad roasts 21 / 3 = 7 of his marshmallows. Joe has 21 * 4 = 84 marshmallows. Joe roasts 84 / 2 = 42 of his marshmallows. Joe and his dad roasted 7 + 42 = 49 marshmallows in total.
The answer is 49.

Answer this question:Jack and Rose want to start a dog-walking business after school. They made 1,236 flyers to hand out around their neighborhood. Jack handed 120 flyers while Rose handed 320 flyers. How many flyers are left to be handed out around?
Jack and Rose handed a total of 120 + 320 = 440 flyers. So, they still have 1236 - 440 = 796 flyers left to be handed out around.
The answer is 796.

Answer this question:Kirsty collects small models of animals. The last time she bought some, each one cost $0.45. She saves enough to buy 30 models, but when she goes to the shop, she finds out that the price had increased to $0.50. How many models can she buy now?
Kirsty has 0.45 × 30 = $13.50 to spare to buy her models. She can only buy 13.50 ÷ 0.50 = 27 models as the price of each individual model has increased.
The answer is 27.

Answer this question:At a birthday party, there are 20 red balloons and 15 green balloons. Before the party started, 3 red and 2 green balloons burst. How many balloons are left?
There are a total of 20 + 15 = 35 balloons at the party. Out of the 35, 3 + 2 = 5 balloons burst. Thus, only 35 - 5 = 30 balloons are left.
The answer is 30.