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In this worksheet, you have to find the missing numbers in addition grids.

 

Look at this grid.

 

+ 1 2 3 4 5
1          
2       6  
3          
4   6      
5          

 

It shows that 2 + 4 = 6 and 4 + 2 = 6

 

Now look at this grid.

 

+ 1 2 3 4 5
1          
2 3     6  
3          
4   6      
5       9  

 

It now also shows that 2 + 1 = 3 and 5 + 4 = 9

 

 

Example

Complete the grid below to find the value of A.

 

+ 1 2 3 4 5
1 2 A 4 5 6
2 A 4 5 6 7
3 4 5 6 7 8
4 5 6 7 8 9
5 6 7 8 9 10

 

Answer

2 + 1 = 3 and 1 + 2 = 3

A is 3

 

+ 1 2 3 4 5
1 2 3 4 5 6
2 3 4 5 6 7
3 4 5 6 7 8
4 5 6 7 8 9
5 6 7 8 9 10

10 questions