Modual 1 Flashcards
What does something to the power of a 1/2 mean? e.g. 25{1/2}
Square root e.g. √25 = 5
What do all of the number differences of square numbers all have in common?
All of the numbers are odd and they go up in two’s
What are the first five square numbers?
1, 4, 9, 16, 25
What does BIDMAS stand for?
Brackets, Indices, Division, Multiplication, Addition, Subtraction
What are the first five cube numbers?
1, 8 , 27, 64, 125
How do you work out a cube number?
Any number multiplied by it’s self three times
e.g. 4x4x4, 26x26x26
What does something to the power of a 1/3 mean? e.g. 64{1/3}
Cube root e.g. 1/3√64 = 4
What does something to the power of 1/4 mean? e.g. 81{1/4}
Fourth root e.g. 1/4√81 = 3
What is the factor tree?
A diagram which is used to find all of the prime factors from a number
How do you decide something to d.p? e.g. 7.45839
Look at the second number after the decimal place e.g. 5, so the decider is 8, 8 is more than five therefore we round up which gives the final answer of 7.46
How do you decide something to 2 s.f? e.g. 54.3651
Look at the second number out of the whole number e.g. 4, the decider is 3, 3 is lower than 5 therefore we do not round at all and that will give you the answer of 54
If you get a number where the first couple of numbers are 0 but you have to round to 3 s.f, what do you do?
Exclude the 0’s. The 0’s are not significant
A length is given as 2.4m to the nearest 0.m. What is the upper and lower bound?
Upper bound = 2.45
Lower bound = 2.35
What is the difference between 1 d.p and 1 s.f? e.g. 0.043734
1 d.p goes for the first number after the decimal place e.g. 0.0
1 s.f goes for the first whole number e.g. 0.04
How do you estimate?
1) round everything off
2) work out the sum using easy numbers
