北京版三年级上册Lesson 21优秀同步训练题

UNIT 6 I HAVE FIFTY MARKERS

Lesson 21同步练习

一、拍拍手,读读下面的歌谣。

A plus B is 100. A minus B is 20.

A is 60, B is 40.

A plus B is 90. A minus B is 50.

A is 70, B is 20.

A plus B is 70. A minus B is 10.

A is 40, B is 30.

二、读读写写。

三、选择填空。

(    )1. Look ________ the numbers on the blackboard.

A. on    B. in    C. at

(    )2. ________ can guess the missing numbers?

A. What    B. When    C. Who

(    )3. Fifty ________ ten is forty.

A. minus    B. plus    C. and

(    )4. Forty ________ twenty is sixty.

A. minu    B. plus    C. and

(    )5. The missing numbers ________ eighty and seventy.

A. is    B. are    C. am

四、照样子, 计算。

例: Eighty minus twenty is sixty.

1. ________________________________

2. ________________________________

3. ________________________________

4. ________________________________

5. ________________________________

五、从方框中选出合适的词填空。

1. I have many ________. I can draw pictures with them.

2. He has three ________.

3. My friend Jim has ________ books.

4. Ten ________ twenty is thirty.

5. Ninety ________ thirty is sixty.

参考答案

一、略

二、略

三、1. C  2. C  3. A  4. B  5. B

四、1. One hundred minus forty is sixty.

2. Seventy minus twenty is fifty.

3. Ninety plus ten is one hundred.

4. Thirty plus forty is seventy.

5. Forty plus forty is eighty.

五、1. markers  2. erasers  3. fifty  4. plus  5. minus