find unknown numbers
Flashcard
•
Mathematics
•
1st Grade
•
Practice Problem
•
Hard
Wayground Content
FREE Resource
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the process to find an unknown number in an equation?
Back
To find an unknown number, isolate the variable by performing inverse operations on both sides of the equation until the variable is alone.
2.
FLASHCARD QUESTION
Front
In the equation x + 7 = 10, what is the value of x?
Back
x = 3, because 10 - 7 = 3.
3.
FLASHCARD QUESTION
Front
How do you solve for an unknown number when it is added to a known number?
Back
Subtract the known number from the total to find the unknown number.
4.
FLASHCARD QUESTION
Front
What is the value of x in the equation x + 10 = 20?
Back
x = 10, because 20 - 10 = 10.
5.
FLASHCARD QUESTION
Front
In the equation 20 + y = 25, how do you find y?
Back
Subtract 20 from 25 to find y, so y = 5.
6.
FLASHCARD QUESTION
Front
What is the method to find an unknown number when it is subtracted from a known number?
Back
Add the unknown number to the result to find the original number.
7.
FLASHCARD QUESTION
Front
In the equation 9 - ? = 3, what is the unknown number?
Back
The unknown number is 6, because 9 - 6 = 3.
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