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How many positive do you need to balance out 5 negatives? QUESTION OF THE DAY Agenda 1. set up bead project 2. go over or do lesson 1 exercise #1-2 3. notes on lesson 1 4. problem set #1,2 and 5 on a separate sheet of paper Bead project We are going to create addition problems using these beads and pipe cleaners and integers and number lines. You will receive a bag of beads The blue beads are negatives and the whites are positive. The black is 0 As you see the problem add that many beads to the “number line” pipe cleaner. Lets try some Create this problem using beads 3+-5 So put 3 white beads on one side and fold just the end of the cleaner, so beads do not fall off Put 5 blue beads on other side and fold just the end of the cleaner, so beads do not fall off One more try -2+3 So put 3 white beads on one side and fold just the end of the cleaner, so beads do not fall off. Put 2 blue beads on other side and fold just the end of the cleaner, so beads do not fall off. Now lets solve Make sure the ends are folding so they wont fall off. Now fold number line on 0 “the black bead” One side will be longer the other. The longer side will show you the answer Example. If the there are 4 more white beads than blue then the answer is positive 4 Try the whole process on your own 5+-2 -6+5 -3+1 4+-4 Integer notes Add positive integers by counting up and add negative integers by counting down. Additive inverse An integer plus its opposite sum to zero. 7+-7 =0 -8+8=0 The opposite of a number is called the additive inverse because the two numbers’ sum is zero. 5.5+(-5.5)=0 1/2 + (-1/2)=0 Assignment 1. lesson 1 exercise #1-2 (if not done) 2. problem set #1,2 and 5 on a separate sheet of paper Exit ticket A number and its additive inverse always equals ____________?