EE. Addition Methods 
Solve each problem two ways: using a paper-and-pencil method and a mental math strategy.
- 76 + 27 =
- 143 + 95 =
- 249 + 175 =
- Which methods do you like to use? Explain why.
Unit Overview
- Daily Practice and Problems
- Home Practice
Lesson 1
Lesson 2
Lesson 3
Lesson 4
Lesson 5
- Part 1: Mental Math Strategies for Subtraction
- Part 2: Subtracting with Base-Ten Pieces
- Part 3: Subtracting with the Traditional Algorithm
- Part 4: Checking with Addition
- Part 5: Showing Work with Expanded Form
- Part 6: Using Mental Math to Subtract
- Summarizing the Lesson
- Homework and Practice
- Answer Keys
Lesson 6
Lesson 7
Lesson 8
Lesson 9
Lesson 10
Lesson 9
Paper-and-Pencil Multiplication
Est. Class Sessions: 2–3Daily Practice and Problems
Teacher Notes
X
TIMS Bit
A paper-and-pencil method and a mental math strategy are given for each.
- Answers will vary. Possible response: For mental math, I like using friendly numbers because they are easy to remember. For a paper-and-pencil strategy, I like using the all-partials method because it is easy to calculate ones, tens, and hundreds separately.