In this prealgebra/grade 7 math lesson, I solve a variety of integer problems:
In the second part of the lesson, we start out with two tricky TRUE/FALSE questions:
Lastly, I solve a problem where we enlarge a triangle by using the scale factor of 3. The three vertices of the triangle are at the points (−1, −2), (1, −1), and (0, 1) in the coordinate grid. Then we multiply all those coordinates by 3 to get a new, bigger triangle that is similar to the original.
Multiplication of integers — a video lesson
Division of integers — a video lesson
Math Mammoth Integers — a selfteaching worktext with explanations & exercises for all operations with integers
Math Mammoth Grade 7 complete curriculum
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 How to help a student who is behind You will also receive: A GIFT of over 400 free worksheets and sample pages from my books right in the very beginning. A monthly collection of math teaching tips & Math Mammoth updates (unsubscribe any time)We respect your email privacy.
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Maria's Math TipsEnter your email to receive math teaching tips, resources, Math Mammoth news & sales, humor, and more! I tend to send out these tips about once monthly, near the beginning of the month, but occasionally you may hear from me twice per month (and sometimes less often). Peek at the previous tips here. You will also receive:
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