Modeling Decimals with Graph Paper

This video tutorial covers lesson 5.5 of Go Math for fifth grade, focusing on dividing decimals by another decimal using models instead of the standard algorithm. The instructor demonstrates how to use graph paper to model the division of 1.2 by 0.3 and another example involving hundredths. The video emphasizes the importance of visualizing the division process through models to understand how many groups of a certain size can be formed from a given dividend.

What is the main focus of lesson 5.5 in Go Math for fifth grade?

• Subtracting decimals using graph paper

• Multiplying decimals using standard algorithms

• Dividing decimals by another decimal using models

• Adding decimals using models

Why is graph paper recommended for modeling decimals?

• It is cheaper than plain paper

• It is colorful and engaging

• It makes it easier to create holes made up of hundredths

• It helps in drawing perfect circles

What is the first step in modeling 1.2 divided by 0.3?

• Drawing a circle

• Drawing a hole using graph paper

• Using a calculator

• Writing the numbers in a table

How many lines or boxes are used to draw the first hole?

• 5

• 8

• 10

• 12

What is the purpose of creating groups of 0.3 in the model?

• To find the sum of the numbers

• To multiply the numbers

• To determine how many groups fit into the dividend

• To subtract the numbers

How many groups of 0.3 can be made from 1.2?

• 4

• 3

• 2

• 5

What is introduced in the new example after 1.2 divided by 0.3?

• A problem involving tenths

• A problem involving hundredths

• A problem involving whole numbers

• A problem involving fractions

How many holes are needed for the new example involving hundredths?

• Four

• Three

• Two

• One

What does each box represent in the model for the new example?

• One thousandth

• One hundredth

• One tenth

• One whole

How many hundredths are needed to represent the dividend in the new example?

• 18

• 28

• 38

• 48