 1. Open question
270 seconds
Should students be required to know how to calculate decimal numbers before entering middle school?
2. Word cloud
120 seconds
Name one decimal that is greater than 0.5 and less than 0.7
3. Slide
60 seconds
Decimals are numbers with a decimal point, like 3.14 or 0.5. Decimals can represent amounts that are greater or less than one. Decimals can be used to represent fractions and can be rounded off to the nearest whole number.
Exploring Decimals
4. Slide
60 seconds
Decimals are real numbers that can represent fractions or parts of a whole. They are written with a decimal point, and the numbers to the left of the point indicate how many whole numbers are included, while the numbers to the right of the point indicate the fractional part of the number. Decimals can be added, subtracted, multiplied, and divided just like whole numbers. When performing these operations, it is important to line up the decimal points so that the decimal places match, as this ensures accuracy. Decimals can also be written in expanded or scientific form. In expanded form, the number is written as the sum of the whole number and the fractional part. In scientific form, the number is written in exponential notation, which is a number with a power of 10.
Concepts:
5. Slide
60 seconds
The ancient Egyptians used fractions which were written as the sum of two or more unit fractions which were all powers of two, such as 1/2 + 1/4 + 1/8. The Ancient Chinese used a decimal system that was based on the number 10. The number 0 was only invented in India in the 5th century, before this decimals were not possible to write.
Did you know?
6. Open question
300 seconds
What is a decimal? How is it different from a fraction?
7. Open question
300 seconds
What are some real life examples of when you would use decimals?
8. Open question
300 seconds
What have you learned about decimals so far?
9. Open question
300 seconds
How can you use decimals to solve problems?
10. Drawings
450 seconds
Brain break: Create a unique piece of art using only 5 items found in your kitchen. You must use at least one item from each of the following categories: food, utensils, cookware, cleaning supplies, and a small appliance. Be creative and have fun!
11. Drawings
1350 seconds
Question: You and your friend are running a lemonade stand to make money for a school trip. Your friend suggests pricing the lemonade at \$1.50 per cup. What is the price in decimals? Clues: • A decimal is a way to show a part of a whole number. • When writing a decimal, the decimal point is used to separate the whole number from the fractional part. • Fractions and decimals have the same value, just different ways of writing them. In pairs: Select and solve one of the tasks: A. Write the price of the lemonade in decimals on a piece of paper. B. Draw a picture of how to divide the dollar into parts to help explain the decimal.
12. Poll
60 seconds
What is the decimal for the fraction 3/4?
• 0.75
• 0.3
• 3.4
• 0.4
13. Poll
60 seconds
What is the decimal for the fraction 7/8?
• 0.875
• 7.8
• 0.7
• 8.7
14. Poll
60 seconds
What is the decimal for the fraction 1/2?
• 0.5
• 1.2
• 2.1
• 0.2
15. Poll
60 seconds
What is the decimal for the fraction 5/6?
• 0.833
• 5.6
• 6.5
• 0.6
16. Poll
60 seconds
What is the decimal for the fraction 2/3?
• 0.666
• 2.3
• 3.2
• 0.3
17. Open question
270 seconds
Work together in pairs: What is the place value of the digit 7 in the decimal 0.07?