Decomposing Numbers and Number Lines

This video tutorial teaches how to use number lines for addition. It covers decomposing numbers, understanding number line properties, and provides examples like Amanda's hula hoops and school buses to demonstrate addition using number lines. The tutorial emphasizes the flexibility of number lines in showing any range of numbers and counting by various increments.

What does decomposing a number mean?

• Breaking a number into smaller parts

• Adding two numbers together

• Multiplying a number by itself

• Subtracting one number from another

What do the arrows at the end of a number line indicate?

• The number line is only for positive numbers

• The number line is finite

• The number line continues indefinitely

• The number line is circular

How can you count on a number line?

• By any number you choose

• Only by tens

• Only by ones

• Only by fives

What is the sum of Amanda's hula hooping sessions?

• 40

• 55

• 60

• 45

How do you decompose the number 15 in Amanda's example?

• Into 5 and 10

• Into 10 and 5

• Into 12 and 3

• Into 7 and 8

What is the first step in solving the school buses problem?

• Dividing the numbers

• Multiplying the numbers

• Decomposing the numbers

• Subtracting the numbers

What is the final sum of the school buses problem?

• 62

• 64

• 60

• 58

What is the range of the number line used in the school buses example?

• 56 to 86

• 0 to 30

• 15 to 45

• 30 to 60

What is the purpose of using a number line in addition?

• To divide numbers

• To make subtraction easier

• To multiply numbers

• To visualize the addition process

What is the benefit of starting with a larger number when adding on a number line?

• It makes subtraction easier

• It reduces the number of steps needed

• It increases the sum

• It makes multiplication easier