Compensation Method for Adding 2-Digit Numbers

This video tutorial covers the concept of compensation in two-digit addition. It explains how to adjust numbers to make addition easier by creating tens. Several examples, including 28 + 15 and 37 + 18, demonstrate this method. The video also discusses using tens numbers and ten frames as visual aids. Two word problems, one about bird houses and another about floor tiles, are solved using compensation. The lesson concludes with a preview of the next topic, breaking apart addends as tens and ones.

What does compensation mean in the context of addition?

• Multiplying numbers for quicker calculation

• Adding large numbers without simplification

• Adjusting numbers to simplify addition

• Subtracting numbers instead of adding

How can we simplify 28 + 15 using compensation?

• By making 28 a tens number

• By trading ones to make a ten

• By dividing both numbers by 2

• By adding 2 to 15

What is the result of 34 + 20 using compensation?

• 64

• 50

• 60

• 54

How do we adjust 37 + 18 to simplify it?

• By dividing both numbers by 2

• By making 18 a tens number

• By adding 3 to 18

• By subtracting 2 from 37

What does making an addend a tens number help with?

• Simplifying subtraction

• Simplifying addition

• Simplifying multiplication

• Simplifying division

What is the first step in solving 28 + 17 using compensation?

• Adding 2 to 17

• Making 28 a tens number

• Dividing 17 by 2

• Subtracting 2 from 28

What is the result of 13 + 48 using compensation?

• 65

• 58

• 60

• 61

What is the sum of 54 + 29 using compensation?

• 82

• 85

• 84

• 83

How many more bird houses does Mr. Park need to build to have 50?

• 8

• 10

• 6

• 12

Which two colors of tiles should Mr. Park use to reach 64 tiles?

• Gray and Beige

• White and Gray

• Beige and Black

• White and Beige