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Algebra - the basics! Flashcards | StudBud
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Algebra - the basics!
Algebra - the basics!
12 terms
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StudBud Administration
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A maths quiz to reinforce the concept of algebra.
Flashcards
12 cards
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Questions
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Answers
1
3n = n + 16 If you subtract n from both sides you get 2n = 16. Divide both sides by 2 to get 8
Huh?!
Could you go over that one again?
Yep, makes sense!
2
Ten years from now Sam's age will be 3 times her present age. How old is Sam now?
10a = 3 + a
a + 10 = 3a
3a = 10 + a
3a + 10a
3
Solve this: 4n = n + 12
Replace with incorrect answer
n = 4
n = 12
n = 3
4
Solve this: 20y + 10y = 360
y = 330
y = 12
Replace with incorrect answer
y = 30
5
We omit multiplication signs in algebra so: 5 times a number is 5n. 2 times a number is 2n.
Ah, I get that!
I kinda know what you mean..
Huh?!?
Can you explain that again?
6
Have you mastered Algebra so far?
I'd like a bit more practice.
Yes, it makes perfect sense!
No, letters can't be numbers, can they?
7
Write this as an equation. 5 times a number decreased by 1 is twice the number increased by 11.
5n - 1n = 2n +11n
5n - 1 = 2n + 11
n x 5 - 1 = n x 2 + 11
n + 5 - 1 + 2 x n + 11
8
So let's apply that: 4 times a number is twelve greater than the number.
4 = 12
4 + n = 12 + n
4n = n + 12
4 x n = n + 12
9
Make an equation: A number multiplied by 2 is the same as two decreased by the number.
n +n = n - 2
2n = 2 - n
Replace with incorrect answer
n x 2 = 2 - n
10
What do you know about Algebra?
It's the name of a mathematical concept.
It is the use of letters in the place of an unknown number.
Solving the equation leads to the solution of the problem.
It is all of these things.
11
Now let's solve: 3n = n + 16
Replace with incorrect answer
Take n from each side to get 2n = 16 Divide by 2 so n = 8
Replace with incorrect answer
Add n to the other side for 4n = 16. Divide by 4 so n = 4
12
What you do to one side, you do to the other: Solve this: s + 10 = 3s
s + 10 = 3s so 10 = 4s so s = 2.5
s + 10 = 3s so 10s = 3s so s = 30
s + 10 = 3s so 10 = 2s so s = 5
Replace with incorrect answer
