multiplying and dividing decimals
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Curipod generated lesson: "multiplying and dividing decimals". #1-4
kbecker
Updated 5 months ago
1. Word cloud
120 seconds
What is the symbol for division?
2. Slide
60 seconds
Multiplying decimals is similar to multiplying whole numbers, but you must count the number of decimal places in the problem. Dividing decimals is similar to dividing whole numbers, but you must move the decimal point in the divisor and dividend to make it a whole number. Remember to count the number of decimal places in the answer and move the decimal point to the correct position!
Multiplying and Dividing Decimals
3. Slide
60 seconds
Multiplying decimals: The process of multiplying two or more decimal numbers together. The product of two decimals can be found by multiplying the numbers as if they were whole numbers and then adding the decimal points in the correct place. Dividing decimals: The process of dividing one decimal number by another. When dividing a decimal by another decimal, shift the decimal point in the divisor (the second number) to the right until it becomes a whole number, then shift the decimal point in the dividend (the first number) the same number of places to the right. Divide the whole numbers as you would with regular numbers, and then shift the decimal point in the quotient (the answer) the same number of places to the left. Rounding decimals: The process of estimating a decimal number to a certain level of accuracy. To round a decimal number, look at the place value of the digit to the right of the place you are rounding to. If the digit is 5 or greater, add one to the digit in the place you are rounding to. If the digit is 4 or less, keep the digit in the place you are rounding to the same.
Concepts:
4. Poll
60 seconds
What do you think is the best way to practice multiplying and dividing decimals?
- Working with a partner
- Using online practice tools
- Writing out examples on paper
- Playing an educational game
5. Slide
60 seconds
The symbol for divide (÷) is also known as an obelus, which originates from ancient Greek. The order in which you divide or multiply makes no difference to the answer. For example, 8 ÷ 4 x 2 = 8 ÷ 2 x 4 = 4. The most common way to multiply decimals is to use the 'grid method' where you draw out a grid of the numbers and multiply them out.
Did you know?
6. Open question
300 seconds
What strategies do you use to multiply and divide decimals?
7. Open question
300 seconds
What do you think about the importance of understanding how to multiply and divide decimals?
8. Personalised Feedback
360 seconds
You have a decimal number 3.6 and you need to multiply it by 0.5. What would be the result?
9. Open question
300 seconds
How can understanding multiplying and dividing decimals help you in school?
10. Open question
300 seconds
What is one challenge you faced while learning how to multiply and divide decimals?
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