Inv 2.2 Subtracting of intergers.
Answers to page 45 ACE #18-29 - Answers Found here. Subtraction of integer strategies: Students may already see that you can change a subtraction expression to addition by adding the opposite of the second number. Some may realize that when you are subtracting, you will get a positive answer if the number you start with is greater than the number you subtract. For example, 17 + − 15 + , 17 + − 1 − , and 15 − − 21 − all give positive results. You will get a negative answer if the number you start with is less than the number you subtract. For example, 13 + − 1 + 5 , 1 − − 1 + 5 , and 1 − 5 − 1 − 3 all give negative results. To find the value of the answer, you find the difference of the numbers. Some students will thin...
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