The addition of integers
Operations with integers I
 

6-a. Add each number of the magic square to the number on the outside.
  Esta unidad interactiva requiere la máquina virtual de Java J2RE.

In this exercise you have to add each number of the magic square to the number on the outside.
The results are the numbers below. Take them to the corresponding cells in the square on the right.

The addition and the subtraction are included in the same operation, because adding up a negative number is the same as subtracting a natural number.
6-b. Add each number of the magic square to the number outside.
  Esta unidad interactiva requiere la máquina virtual de Java J2RE.

This exercise is similar to the previous one, but all the cells must be filled.

In this exercise you have to add or subtract each number of the magic square to the number on the outside.
The results are the numbers below. Take them to the corresponding cells in the square on the right.
       
           
  Eduardo Barbero Corral
 
Spanish Ministry of Education. Year 2007
 
 


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