Compensation Strategy in Addition

Mr. Lee introduces the compensation strategy for solving addition and subtraction problems. This mental math technique involves rounding numbers to the nearest hundred to simplify calculations. The video provides examples for both addition and subtraction, demonstrating how to adjust the final result to account for the rounding. If the compensation strategy is not effective, Mr. Lee suggests exploring other strategies like the jump or reversibility strategy.

What is the main purpose of using mental strategies like compensation in math?

• To make calculations more complex

• To memorize numbers

• To help think and solve problems more easily

• To avoid using calculators

What is the compensation strategy primarily used for?

• Multiplication and division

• Addition and subtraction

• Geometry problems

• Algebraic equations

When using the compensation strategy for addition, what should you do with the number 199?

• Subtract 10 from it

• Round it to 200

• Add 10 to it

• Round it to 150

In the example of adding 199 and 468, what is the final result after applying the compensation strategy?

• 668

• 669

• 670

• 667

Why do we subtract one when rounding 199 to 200 in the compensation strategy?

• To check the accuracy

• To make the calculation harder

• Because 199 is one more than 200

• Because 199 is one less than 200

What is the first step in using the compensation strategy for subtraction with the number 99?

• Round it to 90

• Subtract 10 from it

• Round it to 100

• Add 10 to it

In the subtraction example, what is the final result after applying the compensation strategy to 285 and 99?

• 183

• 186

• 184

• 185

What is the key benefit of rounding numbers in the compensation strategy?

• It makes numbers smaller

• It complicates the process

• It simplifies calculations

• It makes numbers larger

If the compensation strategy does not work for you, which alternative strategy is suggested?

• Jump strategy

• Hop strategy

• Skip strategy

• Leap strategy

What should you do if you find the compensation strategy difficult to apply?

• Ask a friend for help

• Use a calculator

• Try a different strategy

• Give up on math