The video tutorial demonstrates how to solve addition problems by breaking down numbers into tens and ones. It starts with the problem 53 plus 17, showing how to rearrange and add numbers using the properties of addition. The instructor explains the use of parentheses to prioritize operations and illustrates the process with another example, 41 plus 9. The video emphasizes understanding the flexibility in the order of addition to simplify calculations.

What is the result of adding 53 and 17?

• 60

• 70

• 50

• 80

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

What does breaking up the number 53 into 50 and 3 demonstrate?

• Division method

• Subtraction method

• Multiplication method

• Decomposition method

Tags

CCSS.2.NBT.B.7

How does breaking numbers into tens and ones help in addition?

• Changes the total

• Increases complexity

• None of the above

• Simplifies calculation

Tags

CCSS.1.OA.A.1

What property allows the rearrangement of numbers in an addition problem?

• Commutative property

• Associative property

• Distributive property

• Identity property

Tags

CCSS.1.OA.B.3

What mathematical concept is demonstrated by changing the order of addition?

• Associative property

• Absolute property

• Commutative property

• Distributive property

Tags

CCSS.1.OA.B.3

What is the sum of 3 and 17?

• 18

• 19

• 21

• 20

Tags

CCSS.1.OA.A.1

What is the final result of adding 50 and 20?

• 65

• 75

• 70

• 80

Tags

CCSS.2.NBT.B.6

In the Khan Academy example, what two numbers are added first?

• 40 and 9

• 1 and 9

• 40 and 1

• 41 and 9

Tags

CCSS.1.NBT.C.4

CCSS.2.NBT.B.5

What is the result of adding 1 and 9 in the Khan Academy problem?

• 9

• 12

• 11

• 10

Tags

CCSS.1.OA.A.1

What is the final result when adding 40 and 10?

• 60

• 50

• 40

• 30

Tags

CCSS.2.OA.A.1