Subtracting Integers Concrete

subtracting integers with counters




Yet another method of remembering how to subtract is the inverse method where you change the subtraction to addition and change the sign of the number you will subtract. For example: +4 - (+5) 
                                                                                                            = +4 + (-5) . 
Since the second number is a negative integer, move left on the number line. Answer = -1

another example: -5 -(-2) 
                        = -5 + (+2) second number is a + number so move right on the number line
                        = -3



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