Math CC7/8 – Be Prepared On Desk: Learning Log: Pencil Math Journal

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Presentation transcript:

Math CC7/8 – Be Prepared On Desk: Learning Log: Pencil Math Journal Both Learning Logs Textbook Learning Log: HW: p. 44 #1-17, #60, #64 Parent Sig. on Test/TS (by Wed) Parent Sig. on LL (by Wed) Retakes- Thurs., rm. 212, 2:10-3:00 PM (Mrs. Miner)

Tasks for Today Pass back SD Test- AN -Lesson 2.1 Begin HW? Return signed by Wednesday: LL & Tracking Sheet Retakes Thurs, rm 212, 2:10-3:00 AN -Lesson 2.1 Begin HW?

Open to AN p. 30 Add this vocab to your journal.

Sign of answer matches sign of addend with greater absolute value Addends have different sign! Addends have same sign! Sign of answer matches Add absolute values Subtract absolute values, take sign of greater absolute value

Add these Algorithms to your Journal: Adding Integers Addends have same sign! Addends have different sign! Sign of answer matches Sign of answer matches sign of addend with greater absolute value Ex.: -8 + -12 = -20 I-8I + I-12I = 8 + 12 = 20 Ex.: -8 + 12 = 4 I12I - I-8I = 12 - 8 = 4 Then take the sign of the greater abs. value (+12), so the answer is positive 4

Yes, the algorithm works with fractions and decimals , too!

It doesn’t matter in which order the addends are written… Yes, both are +2 Yes, both are Yes, both are It doesn’t matter in which order the addends are written… The sum will be the SAME!

The addends are opposites, and the sums are all zero.

No, this is not correct. It is true for positive numbers, but NOT true for negative numbers