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题型:阅读理解-单选 难度:0.65 引用次数:26 题号:19647558

Have you ever noticed that a number is so amazing? Do you want to get some magic power from a number? Just take a look and see what it is.

The digits (位) of multiples (倍数) of 9 always finally add up to 9:

No matter how large the number, just keep adding the digits of the answer together, and finally you’ll get 9!
Nines can make you look like a calculator
Just prepare a piece of paper and a pen. Let’s play a number trick now!
①Draw 4 rows of 5 spaces each, like this:   

⓶Ask a friend to fill in the first and third rows with any numbers. (This will work no matter what numbers your friend writes in the first and third rows.)
So your friend might write:

③Below each number, write the number that will add up to 9!
The trick? You will quickly complete the sum (总数) that has the answer 199.998.
1. From the text, the digits of multiples of 9 always finally add up to ________.
A.4B.5C.8D.9
2. We can learn from the text that ________ while playing the number trick.
A.it’s necessary to prepare a calculator
B.the friend can write in the first and second rows
C.the friend can only write down the same number
D.it’s important to write the number that will add up to 9
3. The text is mainly about the ________ of the number 9.
A.magic powerB.different meaningsC.fun historyD.interesting stories
【知识点】 游戏 数字与数据 说明文

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