Basic Algebra Review Flashcards
What sign is a negative times/divide a negative?
Positive
What sign is a negative times/divide a positive?
Negative
How do you add a positive number and a negative number?
For example, 4+-7.
Whenever you are adding and the numbers have opposite signs, you subtract them and give the answer the sign of the bigger value.
For example, 4+-7=-3 since 7-4=3 and 7 is bigger than 4.
How do you subtract a negative number?
For example, 8 - -5.
The two neighbour negatives turn into a positive, so you add them.
8+5=13
What does it mean when you square a number?
You multiply it by itself.
How do you add a positive number and a negative number?
For example, 24+-50.
Whenever you are adding and the numbers have opposite signs, you subtract them and give the answer the sign of the bigger value.
For example, 24+ -50= -26 since 50-24=26 and 50 is bigger than 24.
How do you add a negative number and a positive number?
For example, -11+7.
Whenever you are adding and the numbers have opposite signs, you subtract them and give the answer the sign of the bigger value.
For example, -11+7=-4 since 11-7=4 and 11 is bigger than 4.
How do you add a negative number and a positive number?
For example, -20+50.
Whenever you are adding and the numbers have opposite signs, you subtract them and give the answer the sign of the bigger value.
For example, -20+50=30 since 50-20=30 and 50 is bigger than 30.
How do you isolate a variable in an equation?
You apply BEDMAS backwards until the variable is all alone with no exponents
What is the order of operations?
- Brackets
- Exponents
- Division/Multiplication
- Addition/Subtraction
What sign is a positive times/divide a positive?
Positive
How do you subtract a number that is too big?
For example, 15-35.
Since the second number is bigger, the answer will be negative. You just subtract them and make the answer negative.
15-35=-20 since 35-15=20 and you just make it negative.
