Subtraction Principle Worksheet

                    Lesson 1

                                                                                               

                                                            Problem:                   Find value of the variable.

                                                                                                            b + 5 = 17

                                                            Step 1:                    If we add or subtract both sides by same number, balance is maintained.

 

                                  

                                                            Step 2:                    We subtract 5 both sides, b remains unchanged

                                                                                   

                                                                                                            = b + 5 - 5 = 17 - 5

                                                                                                = b = 12                                                                            

Step 3:                    The answer is:  12

                                                                                                      

 

 

                                                            Try two practice problems:  

 

 

                                                                                               Fill in the blank with correct sign.

                                                                         

     

A. y + 8 = 20

 

 

B. a + 4 = 32

 

 

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