
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)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?
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)打算如何解决问题:
你会用什么方法?
You can
guess an answer for the first clue. Then you can check your guess with the second
clue.
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:
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。
严肃声明:本系列文章由吉林出版集团授权转载,如无授权,请勿转载。中文翻译仅代表译者个人观点,仅供参考,如有不妥之处,欢迎指正。
练 习:
Use guess and check to solve the problem.
Jack and Susan work in a shoe store. Last week, Jack sold 6 more pairs of shoes than Susan did. Together they sold 30 pairs. How many pairs of shoes did each person sell?
Jack ___________ pairs.
Susan ___________ pairs.
(1) Underline what the problem asks.
(2) Check your answer.
(3) Complete the blank with right numbers.
答 案:
1.How many pairs of shoes did each person sell?
2.Clue 1: Jack’s Shoes + Susan’s Shoes = 30
Check: 18 + 12 = 30
Clue 2: Jack’s shoes Susan’s shoes = 6

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严肃声明:本系列文章由吉林出版集团授权转载,如无授权,请勿转载。中文翻译仅代表译者个人观点,仅供参考,如有不妥之处,欢迎指正。