
Adding and Subtracting Decimals (1st Period)
Flashcard
•
Mathematics
•
7th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a decimal?
Back
A decimal is a fraction whose denominator is a power of ten, represented with a decimal point. For example, 0.5 is a decimal representation of 5/10.
2.
FLASHCARD QUESTION
Front
How do you add decimals?
Back
To add decimals, align the numbers by the decimal point and add as you would whole numbers, placing the decimal point in the sum directly below the other decimal points.
3.
FLASHCARD QUESTION
Front
How do you subtract decimals?
Back
To subtract decimals, align the numbers by the decimal point and subtract as you would whole numbers, placing the decimal point in the difference directly below the other decimal points.
4.
FLASHCARD QUESTION
Front
What is the importance of lining up decimal points when adding or subtracting?
Back
Lining up decimal points ensures that each digit is in the correct place value, which is crucial for accurate calculations.
5.
FLASHCARD QUESTION
Front
If Linda had $20 and spent $16.78, how do you find her change?
Back
Subtract the total spent from the amount she had: $20.00 - $16.78 = $3.22.
6.
FLASHCARD QUESTION
Front
What is the result of 56.6 mL - 3.2 mL - 6 mL?
Back
First, subtract 3.2 mL from 56.6 mL to get 53.4 mL. Then subtract 6 mL to find the remaining solution: 53.4 mL - 6 mL = 47.4 mL.
7.
FLASHCARD QUESTION
Front
How do you calculate the total cost including tax?
Back
To calculate the total cost including tax, multiply the original price by the tax rate and add that amount to the original price.
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