| 阅读理解。 |
| A Leg Walking Right Here are some signs + - x..., the signs are very different. They mean very different things. When you see them, you know what to do. This sign + means that you will add some numerals. This sign-means that you will take one numeral away from another. You will subtract (减去). What will you do when you see x and...? Our signs are easy to read. They are easy signs to remember. Look at these two signs….The ancient Egyptians used these signs. A picture of a leg walking to the left told them to add some numerals. A picture of a leg walking to the right told them to subtract. In the 1500s people used this printed (印刷的) sign & to add numerals. After a while the sign began to look like this... Later, the sign became +. How much is 2...2? |
| 1. What do you do when you see this sign +? |
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| A. Walk away B. Write a numeral C. Read a sign D. Add |
| 2. The word in the story that means to take one numeral away from another is _____. |
| 3. The story says, "Our signs are easy to read. They are easy signs to remember".The word "they" means _____. |
| 4. Which of the following does this story lead to believe? |
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| A. Egyptians could not add numerals together B. All Egyptians had two left legs. C. Our signs are not hard to understand |
| 5. What did the sign to add numerals begin to look like (which sentence is exactly like the one in your book)? |
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| A. After a while, the sign began to look like this... B. After a while, the sign began to look like this +. C. After a while, the sign began to look like this &. |
| 6. The main idea of the whole story is that _____. |
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| A. the signs for adding and subtracting have changed B. People could not write in the 1500s C. the old signs were good for Egyptians but not for us |