Today we discussed thinking about subtraction as addition problems. Following the rules of addition, we can think concretely about what a negative number represents and move it into any place in the addition equation that suits us. Use your notes for review as needed.
Assignment choices:
S) Subtraction worksheet (Link!) follows the basics of subtraction, first rewriting the equation into addition problems, then noting the value of which number is larger (the positive or negative) and solving accordingly. Once you have changed it into an addition problem, you know the steps ...
V) 1.6 Variables in subtraction (Link!) means that you replace the variable, in this case "x" and "y" with a negative value. For some equations the "not-not" will come into play and you will instead add. For others your negative variable will fit right into your addition problem, no rewriting necessary.
For those of you absent today, please start with the "S" option and only if you have someone with you who remembers how to work with the subtraction of negatives ... without subtracting. ;-)
If you were absent today you may also wait to go over it with me!
Due Tuesday
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