Number Flashcards

1
Q

How do you go from fractions to percentage?

A

A/B * 100

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2
Q

How do you go from percentage to fractions?

A

A=%
B=100

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3
Q

How do you go from percentage to decimals?

A

Divide by 100

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4
Q

How do you go from decimals to percentage?

A

Times by 100

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5
Q

How do you go from decimals to fractions?

A

Decimal number divide by place value
Eg:0.2 = 2/10

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6
Q

How do you find the reciprocal of a fraction?

A

Flip it

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7
Q

What is standard form?

A

A way to represent very large numbers or very small numbers
Uses power of 10

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8
Q

What are the characteristics of standard form

A

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

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9
Q

What do you do when you multiply or divide by a negative number when you solve inequalities

A

Flip the sign

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10
Q

How do you calculate a percentage increase?

A

Add 100% to the percentage you want to increase then turn it into decimals and times it by the original number

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11
Q

How do you calculate a percentage decrease?

A

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

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12
Q

How do you work out the nth term of a sequence?

A

Example: 4,12,20,28
12-4=8
Find 0th term so 4-8=-4
So 8n-4

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