Adding by Decomposing Numbers

The video tutorial teaches how to add numbers by decomposing them into tens and ones. It explains the concept of add-ins and the sum in an addition sentence. The tutorial addresses common misunderstandings in decomposing numbers and provides examples using teddy bears and gum drops to illustrate the process. By the end of the lesson, viewers will understand how to decompose numbers and add them effectively.

What does it mean to decompose a number?

• To add it to another number

• To multiply it by another number

• To break it down into smaller parts

• To divide it by two

In the context of addition, what are 'addends'?

• The difference between two numbers

• The numbers being added together

• The result of an addition

• The product of two numbers

How would you decompose the number 25?

• Into 5 tens and 2 ones

• Into 2 tens and 5 ones

• Into 20 tens and 5 ones

• Into 25 tens and 0 ones

In the teddy bear example, what is the sum of the tens when decomposing 25 and 32?

• 70

• 60

• 50

• 40

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

• 73

• 69

• 61

• 71