Decimals Lesson

Introduction to Decimals

Writing Decimals in Different Forms

Decimal Fraction

• a fraction written as a decimal

• a decimal point separates whole numbers from fractions

• ​where ever the decimal is you read "and"

  • ​EX: the word for of 1234.567 is "one thousand, two hundred thirty four AND five hundred sixty-seven thousandths

Connect Decimal Numbers with Fractions

A number can be represented both as a fraction and decimal.

You can also write decimal numbers and fractions with words.

Try matching the different number forms on the next slides.

Multiple Choice

Which fraction does this decimal number match?

0.77

• 7/10

• 77/100

• 7/100

• 700

Multiple Choice

Which fraction does this decimal number match?

0.07

• 7/10

• 7/100

• 70/100

• 7/7

Multiple Choice

How would you write this number in word form?

77/100

• seven tenths

• seven hundredths

• seventy-seven hundredths

• seventy-seven

Multiple Choice

How would you write this number in word form?

7/100

• seven tenths

• seventy tenths

• seventy hundredths

• seven hundredths

Multiple Choice

Which decimal does this fraction match?

13/100

• 13.00

• 0.013

• 0.13

• 1.3

Multiple Choice

Which decimal does this fraction match?

8/10

• 8.0

• 0.8

• 0.08

Multiple Choice

What digit is in the hundredths place?

45.09

• 5

• 9

• 0

• 4

Multiple Choice

What does the model represent?

• 9

• 90

• 0.9

• 0.09

Multiple Choice

Which of the following represents the amount shaded in the model?  

• 1.09
• 1.9
• 1.99
• 1.009

Multiple Choice

.45 is written like __________

• Forty-five tenth
• Forty-five hundreds
• Forty-five
• Forty-five hundredths

Multiple Choice

Seven tenths is ________

• .7
• .07
• 7

Multiple Choice

7/10 can also be written like ________

• 7/100
• .07
• seven tens
• 70/100

Multiple Choice

What does this represent if written as a decimal?

• 0.23
• 0.023
• 2.3
• 23

Multiple Choice

How much is the shaded area?

• 0.86
• 0.80
• 0.90
• 0.84

Multiple Choice

Write the fraction and the decimal shown by the model.

• 5/100   and   0.5
• 5/10    and   0.05
• 5/100  and   0.05
• 5/10   and  0.5

Multiple Choice

What is the word form of the number 0.9?

• nine tens
• nine tenths
• zero point nine
• nine oneths

Multiple Choice

What decimal does the figure below represent?

• 79
• 0.89
• 0.79
• 0.21

Multiple Choice

What is the standard form of twelve and five tenths?  

• 125
• 12.5
• 12.50
• 12.400

Multiple Choice

What decimal is illustrated in the image?

• 0.40
• 0.20
• 0.60
• 1.20

Multiple Select

How do you feel about writing numbers as decimals and fractions?

• I feel confident. I could teach it to someone else!

• I feel confident about writing numbers as fractions and decimals.

• I feel okay, but I may need a little practice.

• I feel confused about writing numbers as fractions and decimals. I need help.