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GCSE OCR MATHS > Section One > Flashcards

Section One Flashcards

Number

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1
Q

What is an integer

A

A whole number

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2
Q

What are rational numbers

A

They are either integers, fractions or terminating or recurring decimals

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3
Q

What is an irrational number

A

They are never ending, non repeating decimals

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4
Q

What is BODMAS

A 
B-Brackets
O-Other things
D-Divison
M-Multiplication
A-Addition 
S-Subtraction
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5
Q

What are Multiples

A

The Factors of a number are all the numbers that divide into it

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6
Q

What is a prime number

A

A prime number is a number which doesn’t divide by anything, apart from itself and 1 ( however 1 is not a prime number)

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7
Q

How to find prime factors

A

Using a factor tree

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8
Q

What is LCM and how to find it

A

It is the smallest number that will divide by all numbers in question.

First list all the prime factors that appear in both numbers. If a factor appears more than once in one of the numbers list it the same amount of times and multiply together to give the LCM

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9
Q

What is the HCF and how to find it

A

It is the Biggest number that will divide by all numbers in question.

First list all the prime factors that appear in both numbers. Multiply together to find the HCF.

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10
Q

Fractions- what is cancelling down

A

Simplifying a fraction

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11
Q

Fractions- what are mixed numbers

A

Mixed numbers are numbers with an integer and a fraction part

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12
Q

Fractions- How to multiply fractions

A

Multiply top and bottom separately

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13
Q

Fractions- How to divide fractions

A

Turn the 2nd fraction upside down and then multiply

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14
Q

Fractions- How to get a common denominator

A

Find the lowest common multiple of the denominators

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15
Q

Fractions- How to add or subtract fractions

A

First make sure the denominators are the same then add/subtract the numerator only. Convert to improper fractions first

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16
Q

How to get a fraction to a decimal to a percentage

A

From a fraction divide to get a decimal and times by 100 to get a percentage

17
Q

How to get a percentage to a decimal to a fraction

A

From a percentage divide by 100 to get a decimal then either use the X method for recurring decimals or for terminating decimals its easy

GCSE OCR MATHS (1 decks)

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