Decimals in the World
Place Values
Adding Decimals
Subtracting Decimals
100
A point or dot that is used in a number to separate whole numbers from partial numbers.
What is a decimal?
100
When adding two numbers with decimals together, what is the first and most important step to take?
Align the decimal points in the problem, solve, bring down the decimal point into the answer right under the decimal points in the problem.
100
17.5 + 25.5 = ?
43.0
100
13.7 - 0.8 = ?
12.9
200
What are examples of careers that regularly use decimals?
Pharmacist, Retail, Accounting, Engineer, Land Surveyors, Payroll, etc...
200
Which digit below is in the tenths place?
0.935
9
200
What is 6.7 + 6.8?
13.5
200
45.67 - 30.1 =
15.57
300
What is the most difficult thing to remember when working with decimals?
Answers vary: Aligning the decimals, how to add/subtract/multiply decimals, how to know place value of a number, etc...
300
How you say this number out loud?
0.005
"Five thousandths"
300
If I find a nickel on Tuesday, a dime on Wednesday, and a quarter on Thursday, how much money do I now have in total?
$0.40
300
Jacob is buying groceries for his grandmom. She gave him $20.00 and his groceries cost $9.45. How much change did Jacob return to grandmom?
$10.55, if he returns the change
400
Where can I find decimals around my home?
Clock/ telling time, paychecks, recipes, money and change, etc...
400
Which number is represented below?
24.69
400
Is this answer correct? Why or Why not?
67.5 - 30.2 = 3.73
No, the correct answer is 37.3, there is an error with decimal placement.
400
What happens if you don't align your decimal points before subtracting decimals?
You probably get the wrong answer!