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Monday, December 12, 2011

Addition: 加法:Complete the addition sentence. 加法横式。

 1. Fill in the missing number. 填入正确的答案。

3 + = 10

2.  Fill in the missing number. 填入正确的答案。

+ 6 = 14

 3. Fill in the missing number. 填入正确的答案。

7 + = 12

 4.  Fill in the missing number. 填入正确的答案。

+ 5 = 12

5. Fill in the missing number. 填入正确的答案

4 + = 10



ANSWERS答案:
1. 7     2. 8     3. 5    4. 7    5. 6

Addition 加法

1. Add: 加

2+5
2. Add: 加

3+6
3.  Add: 加

4+5

4. Add: 加

8+1

5. Add: 加

9+5=




ANSWERS答案:
1. 7     2. 9     3. 9     4. 9     5. 14

Round to the nearest ten 找出整数的十位近似值。

1. What is 63 rounded to the nearest ten? 找出63的十位近似值。


2. What is 83 rounded to the nearest ten? 找出83的十位近似值。


3. What is 89 rounded to the nearest ten? 找出89的十位近似值。

4. What is 77 rounded to the nearest ten? 找出77的十位近似值。


5. What is 98 rounded to the nearest ten? 找出98的十位近似值。



ANSWERS答案: 
1. 60     2. 80     3. 90     4. 80     5. 100

Place values 说出100 以内任何数目中数字的数位。

1. What is the value of the underlined digit? 画线数目的数位是?

23

2. What is the value of the underlined digit? 画线数目的数位是?

79


3. What is the value of the underlined digit? 画线数目的数位是?

35


4. What is the value of the underlined digit? 画线数目的数位是?

85


5. What is the value of the underlined digit? 画线数目的数位是?

30




ANSWERS答案: 1. ones 个位     2. ones 个位     3. ones 个位     4. ones 个位     5. tens 十位

Place values 确定数位。

1. What number is shown? 以下积木显示什么数目?
one blockone blockone blockone blockone blockone blockone block

2. What number is shown? 以下积木显示什么数目?
stack of ten blocksstack of ten blocksstack of ten blocksstack of ten blocksstack of ten blocksstack of ten blocksstack of ten blocksone blockone blockone block

3. What number is shown? 以下积木显示什么数目?
stack of ten blocksstack of ten blocksstack of ten blocksstack of ten blocksstack of ten blocksstack of ten blocksstack of ten blocksstack of ten blocksstack of ten blocksone block

4. Which place-value model shows 32? 以下积木哪个是32?
stack of ten blocksstack of ten blocksone blockone blockone block
stack of ten blocksstack of ten blocksstack of ten blocksone blockone block

5. Which place-value model shows 20? 以下积木哪个是20?
one blockone block
stack of ten blocksstack of ten blocks





ANSWERS答案:
1. 7     2. 73     3. 91
4.                
stack of ten blocksstack of ten blocksstack of ten blocksone blockone block


stack of ten blocksstack of ten blocks5.