对照课文听录音
Problem Solving
应用题
John spent ＄10 in all on a hot dog and soda at the baseball game. The hot dog cost ＄6 than the soda. How much did the hot dog cost? How much did the soda cost?
在棒球运动会上约翰花了10美元买了一个热狗和一瓶汽水。热狗比汽水贵6美元。买热狗花了多少钱？买汽水又花了多少钱？
(1)Understand the problem:
(1)理解问题：
What do you want to know?
你想要知道什么？
How much did the hot dog cost? How much did the soda cost?
热狗多少钱？汽水多少钱？
What information is given?
题中给了哪些信息？
Clue 1: ＄hot dog + ＄soda = ＄10
线索1：热狗的花费+汽水的花费＝10美元
Clue 2: ＄hot dog - ＄soda= ＄6
线索2：热狗的花费－汽水的花费＝6美元
(2)Plan how to solve it:
(2)打算如何解决问题：
What method can you use?
你会用什么方法？
针对第一个线索你可以猜测一个答案。然后你再用第二个线索检测你的猜测是否正确。
(3)Solve it:
(3)解决问题：
How can you use this method to solve the problem?
你如何用这种方法解决问题？
You know that hot dog costs ＄6 than the soda. Use 6 as your first guess. Think about what two numbers could equal to. Make a table to organize your guesses.
你知道热狗的价钱比汽水贵6美元。可以把6作为你的第一个猜测，同时想想两个数字相加等于多少。列出表格来组织你的猜测。
What is the answer?
结果是什么？
Hot dog cost ＄8.
热狗的价钱是8美元。
Soda cost ＄2.
汽水的价钱是2美元。
(4)Look back and check your answer:
(4)回过头来再检验你的答案：
Is your answer reasonable?
你的答案合理吗？
Clue 1: ＄hot dog + ＄soda = ＄10
线索1：热狗的价钱+汽水的价钱＝10美元
Check: 8+2=10
检验：8+2=10
Clue 2: ＄hot dog - ＄soda= ＄6
线索2：热狗的价钱－汽水的价钱＝6美元
Check: 8-2 =6
检验：8-2=6
The answer matches the clues. The answer is reasonable.
答案和线索相符合。答案是合理的。
Guess Check Evaluate
猜测 检查 评估
6+4= 10 6 is only 2 more than 4. 6 is too low.
6+4= 10 6只比4多2。 6太小了。
7+3=10 7 is only 4 more than 3. 7 is too low.
7+3=10 7只比3多4。 7 太小了。
8+2=10 8 is 6 more than 2. 8 is correct.
8+2=10 8比2多6。 8是正确的。