Subtracting Integers Cont.

In class, we reviewed how to use visuals (integer chips and the number line) in order to add and subtract integers.  Students then took a brief assessment showing they had mastered the skill.

Afterwards, as a class, we came up with the rules for subtracting integers and learned that we can re-write any subtraction problem as an addition problem by just adding the opposite.  The following s an example:

                                                         5 - (-7)
                                                         5 +  7          - the opposite of -7 is 7.
                                                            12

...and this should make sense to students as the difference (subtraction) between 5 and -7 is 12, or visually, 5 and -7 are 12 spots apart on the number line.

The homework is listed below and the notes are attached.

Notes - Subtracting Integers (2)

HW - pgs. 620-621 (23-42)