IC: Understanding Zero Day 2 Math 7 Thursday, 8/17/16 Write the IC and HW in your planner. IC: Understanding Zero Day 2 HW: Make It Zero Wkst Materials Planner Understanding Zero HW Wkst Pencil Marker & eraser Grading pen Math Folder 1

- - - - - - - - - - - + + - Bellwork 1) What is the overall score of this round and how do you know? 2) The red circles are hot cubes. The yellow circles are cold cubes. How has the temperature changed? The overall score is yellow wins by 1 because the 3 reds cancelled out 3 of the yellows and there was 1 yellow left. The temperature is 1 degree colder (a temperature change of -1) 3) Draw 2 ways to show the number - 5 - - - - - - - - - - - + + -

Bellwork 1) In complete sentences explain what number is represented in this circle. 2) In complete sentences explain what needs to be done to make it represent zero. + + + The number represented is 4 because after finding all the zero pairs, we are left with 4 positives. + + + - - To make this zero we need to either add in 4 negatives OR we could take out 4 positives to make the 4 positives cancel out.

Changing the Temperature Add in OR Take out!

Directions: Use “+” and “-” to make this equal zero. Ex. 1: + + + + + OR + + + - - - - -

Let’s make it mathy! OR + + + + + + + + - - - - - ADD IN 3 NEGATIVES Ex. 1: + + + + + OR + + + ADD IN 3 NEGATIVES - - TAKE OUT 3 POSITIVES - - - Directions: Talk to your neighbor and discuss how you would turn these word sentences into mathematical expressions. Be ready to share!

Final copy for your notes Ex. 1: + + + + + OR + + + - - - - - Subtract out 3 positives Add in 3 negatives Same result!

OR - - + - + - - - + + Same result! Add 2 positives Directions: Draw this picture on your notes. Show 2 different ways to use “+” and “-” to make this equal zero. Write the words and show the mathematical expression. - - Ex. 2: OR + - + - In words: - - Add 2 positives Subtract 2 negatives + + Mathematical Expression: Same result!