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S2 数学 - 基本运算 2.4

Total questions: 10

Worksheet time: 20mins

Name
Class
Date
1.

632 + () = 721

(a)  

2.

142 + () = 542

(a)  

3.

52 + () = 821

(a)  

4.

831 - () = 324

(a)  

5.

732 - () = 198

(a)  

6.

523 - () = 412

(a)  

7.

() + 241 = 412

(a)  

8.

() + 683 = 787

(a)  

9.

() - 241 = 412

(a)  

10.

() - 342 = 212

(a)