What is 3.5 + 2.8? 3.5 + 2.8 等於多少？

What is 3/4 of 20? 20的3/4是多少？

If you have 750 apples and give away 237, how many apples do you have left? 假如你有750個蘋果，然後你給走了237，你會剩多少？(40 seconds)

If a bottle holds 1.5 liters of water, how many milliliters does it hold? 如果一個瓶子能裝1.5升水，那麼它能裝多少毫升？

What is 345 + 218? (you have 40 seconds)

If a book costs $12.99 and you pay with a $20 bill, how much change will you receive? 如果一本書的價格是12.99美元，你用20美元支付，你會收到多少找零？

If you have 2/5 of a pizza and you eat 1/5 of it, how much pizza do you have left? 如果你有五分之二的披薩，吃掉五分之一後，還剩下多少披薩？

What is the perimeter of a rectangle with a length of 8 cm and a width of 5 cm? 一個長方形長8厘米，寬5厘米，周長是多少？

A box contains 24 chocolates. How many chocolates are there in 15 boxes? 一個盒子裡有24塊巧克力。15個盒子裡有多少塊巧克力？

How many centimeters are in 2.5 meters? 2.5米等於多少厘米？

Sarah has 45 stickers. She buys 30 more stickers and then gives 10 to her friend. How many stickers does she have now? Sarah有45張貼紙。她又買了30張貼紙，然後給了朋友10張。她現在有多少張貼紙？