Decomposing Numbers and Addition

This video tutorial teaches how to add numbers by decomposing them into tens and ones. It explains the concept of decomposing numbers, defines addends and sums, and addresses common misunderstandings. The tutorial provides practical examples using teddy bears and gumdrops to illustrate the process of decomposing numbers and adding them to find the total. By the end of the lesson, viewers will understand how to break down numbers into simpler parts to perform addition more easily.

What does it mean to decompose a number?

• To divide it by 2

• To take it apart into smaller parts

• To multiply it by 10

• To add it to another number

In an addition sentence, what are the numbers being added called?

• Sums

• Products

• Addends

• Quotients

What is a common mistake when decomposing the number 24?

• Decomposing it into two 10s and four 1s

• Decomposing it into two 1s and four 1s

• Decomposing it into three 10s and two 1s

• Decomposing it into four 10s and two 1s

How can the number 25 be decomposed?

• Into 20 and 5

• Into 30 and 5

• Into 15 and 10

• Into 10 and 15

What is the sum of the tens when decomposing 25 and 32?

• 40

• 50

• 70

• 60

After decomposing 25 and 32, what is the total sum of teddy bears?

• 77

• 57

• 67

• 47

When decomposing 53 and 18, what is the sum of the tens?

• 50

• 60

• 70

• 80

What is the sum of the ones when decomposing 53 and 18?

• 9

• 12

• 10

• 11

What is the total number of gumdrops when adding 53 and 18?

• 61

• 71

• 81

• 91

What is the main concept learned in this lesson?

• Dividing by decomposing numbers

• Subtracting by decomposing numbers

• Multiplying by decomposing numbers

• Adding by decomposing numbers