Lesson 9.3 and 9.4: Using a Calculator with fractions, decimals, and percents
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Transcript of Lesson 9.3 and 9.4: Using a Calculator with fractions, decimals, and percents
Lesson 9.3 and 9.4:Using a Calculator with fractions, decimals, and
percents
Mental MathFor each fraction, write the equivalent decimal and
percent on your white board.
Example: You would write: ____ and ____ 100
36
100
41
100
93
10
9
4
1
5
4
Math MessageUse your calculator to divide the numerators
of the following fractions by the denominator:
For example, 1divide by 2 = ____ Record your findings in your Math Notebook.
What do you notice?
10
6,5
4,4
3,2
1and
Let’s record what we notice…
We are going to rename each fraction on MJ pages 342 and 343 as a decimal using
division.
Write each digit shown on the calculator up to six digits following the decimal point.
Let’s try 2/3. Press 2 on your calculator, the division button, and 3. What is your decimal?
Write up to 6 digits after the decimal point.
Patterns we noticed…
For example:I see that some of the fractions have short decimal
names with 1, 2, or 3 digits after the decimal point and no other digits behind that.
What do these fractions with short decimal names have in common?
Experiment with the % key on your calculator to find a way to rename ¼
as a percent. Write your method in your Math
Notebook.
One way:
You do NOT need to use the % key on your calculator to rename a fraction
as a percent.
Divide the numerator by the denominator
Once you have the decimal, just multiply the decimal by 100.
Solving Number Stories Involving Discounts
SRB 246