ATN Inv. 2.1b Extending Addition to Rational Numbers Come in and sit quietly. Learning Target: I will continue to move from concrete representations to addition algorithms. Homework: Solve the problems on THE BOTTOM HALF OF p. 6 of the packet for Investigation 2.1 DAY 2 AND CORRECT with the EDpuzzle. Complete this Warm-up in your notebook: Draw a number line model for the number sentence below. Then build 2 chip models to find the solution. ‾4.5 – 4 = ‾4.5 + ‾4 = ‾4.5 – ⁺4 =

‾4.5 – 4 ‾4.5 + ‾4 -5 0 5

‾4.5 – 4 = ‾4.5 – +4 = -5 0 5

Vocabulary Toolkit: A Math rule that states the order addition or multiplication of two numbers does not change the result. 3 + 2 and 2 + 3 ‾4.5 + ⁺3.2 and ⁺3.2 + ‾4.5

Find the difference of the Absolute Values: Take the sign with the greater Absolute Value: ‾8.35 + ⁺5 = ‾3.35 8.35 – ⁺5 = 3.35 ‾8.35

Find the difference of the Absolute Values: Take the sign with the greater Absolute Value: ‾8.55 + ⁺5.3 = ‾3.25 8.55 – ⁺5.3 = 3.25 ‾8.55

8.65 – ⁺5.25 = 3.4 ‾8.65 ‾8.65 + ⁺5.25 = ‾3.4

ATN Inv. 2.1b Extending Addition to Rational Numbers Did I reach my Learning Target? I will move from concrete representations to addition algorithms. Homework: Solve the problems on THE BOTTOM HALF OF p. 6 of the packet for Investigation 2.1 DAY 2 AND CORRECT with the EDpuzzle.