mothergooseof4 Posted September 5, 2012 Share Posted September 5, 2012 I just bought several levels for fun. Ds is not quite getting addition, subtraction, multiplying, and dividing with opposite signed integers. I have searched the TOCs of LOF Fractions, D&P, PreA 1, and PreA 2, but can't seem to find it. Could be my congested, fuzzy head right now, but my brain can't seem to locate this topic. I just want to see how he presents it so I can perhaps give ds a different perspective. I know it has to be there somewhere because I see negatives used in the PreA books. I just can't locate where it is introduced. Can someone help me? Quote Link to comment Share on other sites More sharing options...
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