三年级上册英语一课一练-Unit 6 Lesson 21（2）-北京课改版（含答案）

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[来源:学科网] ( )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. ________________________________[来源:Zxxk.Com] 2. ________________________________ 3. ________________________________ 4. ________________________________ 5. ________________________________ 五、从方框中选出合适的词填空。 minus fifty markers plus erasers 1. I have many ________. I can draw pictures with them. 2. He has three ________. 3. My f