Number Flashcards
How do you go from fractions to percentage?
A/B * 100
How do you go from percentage to fractions?
A=%
B=100
How do you go from percentage to decimals?
Divide by 100
How do you go from decimals to percentage?
Times by 100
How do you go from decimals to fractions?
Decimal number divide by place value
Eg:0.2 = 2/10
How do you find the reciprocal of a fraction?
Flip it
What is standard form?
A way to represent very large numbers or very small numbers
Uses power of 10
What are the characteristics of standard form
Eg :3.4*10^2
- A number between 1 and 10 (includings 1 but not 10)
-10 to the power of….
-integer power(positive or negative
What do you do when you multiply or divide by a negative number when you solve inequalities
Flip the sign
How do you calculate a percentage increase?
Add 100% to the percentage you want to increase then turn it into decimals and times it by the original number
How do you calculate a percentage decrease?
100%-by the percentage you want to decrease then times the original number the decimal number of the percentage you get when - it by 100
How do you work out the nth term of a sequence?
Example: 4,12,20,28
12-4=8
Find 0th term so 4-8=-4
So 8n-4