IC: Decimal WPs…again! HW: Extra Credit #6 Materials Friday, 9/23/16 Write the IC and HW in your planner. IC: Decimal WPs…again! HW: Extra Credit #6 Show work! Materials Pencil & grading pen Slate, Marker, Eraser Ch. 2 Math Folder p.70(3-4, 6, 9, 13-16) 1 1 1

Write an expression that matches this situation 1) The temperature was -27.2 degrees when Bob the Bear woke up in Alaska. At lunch time, the thermometer showed -5 degrees. What was the change in temperature from when Bob the Bear woke up until lunch time? Write an expression that matches this situation Solve. High – Low -5 – (-27.2) -5 + 27.2 The change in temp. was 22.2°

2) Solve. 3) Solve. 9.41 – (-7) -2.38 + 4.7 9.41 + 7 2.32 9.41 + 7.00 4.70 - 2.38 9.41 + + 2.32 7.00 16.41 16.41

4) Find the distance between -8 and -17.5 on a number line. Expression: High – Low 17.5 -8 – (-17.5) - 8.0 9.5 Solve: -8 + 17.5

A D C B Level 2: Partial Command Level 3: Moderate Command Level 4: Strong Command Level 5: Distinguished Command Incomplete Complete Based on conjecture and/or stated or faulty assumptions Based on conjecture and/or stated assumptions Incomplete or illogical steps Logical steps but incomplete Logical steps Major calculation errors Minor calculation errors Calculation precision Limited vocabulary, symbols & labels Some vocabulary, symbols and labels Correct vocab., symbols & labels Correct vocabulary, symbols and labels Partial justification of conclusion Justification of conclusion Evaluates the validity of other approaches and conclusions Evaluates, interprets and critiques the validity of other approaches Evaluates, interprets and critiques the validity and efficiency of other approaches and reasoning and provides a counter-example where applicable. Efficiently solved/explained Generalization of an argument or conclusion A D C B Really good explanation of WHY…

5) Find the distance between 4.2 and -10 on a number line. Expression: High – Low 4.2 4.2 – (-10) + 10.0 14.2 Solve: 4.2 + 10

How far does the dolphin travel? 6) A dolphin is at -5.6 feet. It swims up and jumps out of the water to a height of 9 feet. Write a subtraction expression for the vertical distance the dolphin travels. How far does the dolphin travel? High – Low 9 – (-5.6) 14.6 feet 9 + 5.6 9.00 + 5.6 14.60