Flashcards
maths revision topic one
Cards in this deck (20)
- 1what is 1 to 15 squared?1 ,4 ,9, 16, 25, 36, 49, 64, 81, 100, 121, 144, 169, 196, 225.
- 2what is 1 to 10 cubed?1, 8, 27, 64, 125, 216, 343, 512, 729, 1000.
- 3what are the prime numbers up to 100?2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97.
- 4how to find a prime number?All prime numbers above 5 end in 1, 3, 7, 9.
you need to divide them by 3 and 7 if they dont divide exactly they are prime. - 5what is a factor?a factor of a number are all the numbers that divide into it.
- 6how do you work out the lowest common multiple (LMC)?the method is
1) list all the multiples of all the numbers
2) find the smallest one that's in all the lists. - 7how do you work out the highest common factor (HCF)?the method is
1) list all the factors of all the numbers
2)find the biggest one that's in all the lists. - 8how do you change a fraction to a decimal and to a percentage?to change a fraction to a decimal you divide top by bottom.
decimal to percentage you x100. - 9how do you get a pencentage to a decimal to a fraction?to get a percentage to a decimal you divide by 100.
to get a decimal to a fraction you have to use coloum headings. - 10how do you cancel down fractions?you multiply or divide the top and bottom by the same number.
- 11how do you find a fraction of a number?1) swap the of for x
2) multiply by the top number and divide by the bottom number.
3) start with division its easier. - 12how do you multiply fractions?you multiply the 2 top numbers together then the 2 bottom numbers seperately.
- 13how do you divide fractions?you turn the fraction upside down and the multiply.
- 14how to find the percentages of a number?1) write the percentage as a decimal
2) multiply the number by the decimal. - 15how do you find a new amount after a pecentage decrease?1) find the pecentage of the number
2) its a decrease, so subtract from the orginal. - 16how do you find the new amount after a pecentage increase?1) write a pecentage in a decimal
2) its an increase, so add it to the original. - 17how do you express x as a pecentage of y?1) divide x by y, then multiply by 100.
- 18how do you work out simple intrest in a question?1) work out the amount of intrest earned in one year
2) multiply by 4 to get the total interest for 4 years. - 19how to estimate calculations?1) rounding everything off to 1 significant figure
2) then work out the answer using these nice easy numbers
3) show all your working or you wont get the marks. - 20what are the 3 power rules?1) when multiplying, you add the powers
2) when dividing, you subtract the powers
3) when raising on power to another, you multiply the powers.
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- Flashcards on maths revision topic one, created by kerrycalland15 on 29/11/2015.
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- kerrycalland15 · Nov 2015
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- Feb 19, 2016
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