Remedial Math Bell Work 8/11/14

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Presentation transcript:

Remedial Math Bell Work 8/11/14 Give an example of the following operations: subtraction addition multiplication division

SUBTRACT and use the sign of the larger number. Addition Rule 1) When the signs are the same, ADD and keep the sign. (-2) + (-4) = -6 2) When the signs are different, SUBTRACT and use the sign of the larger number. (-2) + 4 = 2 2 + (-4) = -2

Karaoke Time! Addition Rule: Sung to the tune of “Row, row, row, your boat” Same signs add and keep, different signs subtract, keep the sign of the higher number, then it will be exact!

-1 + 3 = ? -4 -2 2 4 Answer Now

-6 + (-3) = ? -9 -3 3 9 Answer Now

When subtracting, change the subtraction to adding the opposite (keep-change-change) and then follow your addition rule. Example #1: - 4 - (-7) - 4 + (+7) Diff. Signs --> Subtract and use larger sign. 3 Example #2: - 3 - 7 - 3 + (-7) Same Signs --> Add and keep the sign. -10

Which is equivalent to -12 – (-3)? 12 + 3 -12 + 3 -12 - 3 12 - 3 Answer Now

7 – (-2) = ? -9 -5 5 9 Answer Now

Review 1) If the problem is addition, follow your addition rule. 2) If the problem is subtraction, change subtraction to adding the opposite (keep-change-change) and then follow the addition rule.

State the rule for multiplying and dividing integers…. If the signs are the same, If the signs are different, the answer will be negative. the answer will be positive.

Worksheet #’s 9-13 odd, 25-29 odd, 37-41 odd, 45-49 odd