How are you feeling today?
Decimals are written in tenths, hundredths, and thousandths. To multiply decimals, line up the decimal points and multiply as if there were no decimals. To divide decimals, move the decimal point of the divisor to the right until it becomes a whole number.
Multiplying and Dividing by Decimals
Decimals: A number with one or more digits to the right of a decimal point. Multiplying Decimals: Multiplying two numbers with one or more digits to the right of a decimal point. Dividing Decimals: Dividing one number with one or more digits to the right of a decimal point by another number.
Concepts:
What strategy can we use to multiply 7.2 by 10?
Let's see how we can multiply 7.2 by 10 using two different strategies.
Let's work together to multiply 8.4 by 10.
You have 3 minutes to complete the next two problems on your own.
What strategy would you use to solve 521 times 1000?
- Standard Algorithm
- Use place value chart
What strategy can we use to divide 1.6 by 10?
Let's see how we can multiply 1.6 by 10 using two different strategies.
Let's work together to multiply 9.2 by 10.
You have 3 minutes to complete the next two problems on your own.
What strategy would you use to solve 283 divided by 1000?
- Standard Algorithm
- Write as a fraction
- Use place value chart
How did you feel when trying to solve a problem that involved multiplying or dividing by decimals?
How did you know when you had the right answer when multiplying or dividing by decimals?
Brain Break: Draw a donut with sprinkles dancing.
You have 6 minutes to complete the exit ticket on your own.