Unit 2: Addition and Subtraction
UNIT 2: ADD/SUBTRACT WHOLE NUMBERS (Completed)
UNIT 2: ADD/SUBTRACT WHOLE NUMBERS (Completed)
The mathematical focus of Unit 2 is developing and using strategies and methods (including the standard algorithm) for adding and subtracting whole numbers and decimals to the hundredths place in order to solve problems with efficiency and accuracy.
Unit 2 target skills:
- Add and subtract whole numbers and decimals to the hundredths place.
- Add and subtract money.
- Use rounding or compatible numbers to estimate solutions.
- Use strip diagrams to solve a problem.
- Use the standard algorithm to solve addition and subtraction problems.
- Solve multi-step problems involving everyday situations.
- Interpret a graph.
- Represent and solve multi-step problems using an equation with a variable.
- Apply the mathematical process standards.
- LESSON: Khan Academy: Commutative Property of Addition - Click HERE
- LESSON: Smart Learning for All: Commutative Property of Addition - Click HERE
- LESSON: Khan Academy: Associative Property of Addition - Click HERE
- LESSON: Math Antics: Multi-Digit Addition with regrouping - Click HERE
- LESSON: Khan Academy: Adding 3 digit numbers - Click HERE
- LESSON: Khan Academy: Addition with regrouping - Click HERE
- LESSON: Khan Academy: Adding 3 digit numbers with regrouping - Click HERE
- LESSON: Math Antics: Multi-Digit Subtraction with Borrowing (regrouping) - Click HERE
- LESSON: Khan Academy: Multi-Digit Subtraction with Borrowing (regrouping) - Click HERE
- LESSON: MrsCMBP: Subtracting Across Zeros - Click HERE
- LESSON: MrPearson: Subtracting Across Zeros with the "boxing method" - Click HERE
- SONG: 3RD GRADE FUN: The Properties of Addition - Click HERE
- SONG: Numberock!: Subtracting Across Zeros with Regrouping - Click HERE
- GAME: ABCYa: Estimating (Note: choose the larger numbers) - Click HERE