March 20, 2015
Objective: SWBAT........

This week, students continue Number Worlds, Level E, Addition. Students will continue to explore using partial sums and renaming strategies as they move toward the use of the standard addition algorithm.

• Students can determine when an estimated answer is sufficient.

3.OA.8 Solve two-step word problems using the four operations. Represent these problems using equations with a letter standing for the unknown quantity. Assess the reasonableness of answers using mental computation and estimation strategies including rounding.

Vocabulary:

• Addition
• Double Fact
• Near Double Fact
• Nice Numbers
• Grouping
• Regrouping
• Partial Sum
• Carrying
• Estimation

Activity:  

• Warm-Up: Partial- Sums
• Estimate or Exact?
• SWB pg. 56-57

Debrief: 

• Exit slip: Estimating

Homework: None