1. REVIEW
• Make sure you have everything you need (book, agenda,
pencil, calculator (by Monday), notebook.
• Get out your notes and find the two different models for
adding.
• Share with a partner the meaning of the “putting together
model”

2. LESSON 5-1

3. PUTTING TOGETHER MODEL
• Make sure that units are the same for each number.
• Can be used to add distances.
• Related to the Betweeness Property

4. REVIEW (NAMING ANGLES & LINE
SEGMENTS)
•Point
•Line segment
•Angle

5. BETWENNESS PROPERTY
• Two line segments that together make up a larger
line segment, can be added together to find the
length of the larger segment.
+

6. PRACTICE
• On your own, or in groups of two.
• Do 3-5 on page 282
• HINT: there are 16 ounces (oz) in 1 pound (lb)

7. SLIDE MODEL FOR ADDITION
• The slide model uses number lines
• Turn to someone close to you and explain what a number line is.
• In your notes draw a number line that contains the numbers -10, and 6
• Copy definition into notes

8. SLIDE MODEL IN ACTION

9. YOU TRY IT
•On your own or in groups of 2
•Do page 283 questions 6-9

10. COMMUTATIVE PROPERTY OF ADDITION

11. Example:
1 + 10=10 + 1
-5 + -10 = -10 + -5 Try 11 & 12 on
page 283

12. HOMEWORK
• Lesson Master 9-1
• Due Tuesday the 13th.