1. 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 =

2. ‾4.5 – 4
‾4.5 + ‾4

3. ‾4.5 – 4 =
‾4.5 – +4 =

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

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

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

9. 8.65 – ⁺5.25 = 3.4
‾8.65
‾ ⁺5.25 = ‾3.4

14. 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 of the packet for Investigation 2.1 DAY 2 AND CORRECT with the EDpuzzle.