Transcript EXAM TIPS - South Wolds Academy

EXAM TIPS
What to do
and
What not to do!
ALWAYS SHOW YOUR WORKING OUT
Most questions are worth two or
more marks, so even if you make a
slip and get the final answer wrong,
you can often pick up a mark by
showing you knew the right method.
DOES YOUR ANSWER LOOK RIGHT?
With some questions (especially
involving size or measurements) you
can see if you've gone horribly
wrong.
If you find an angle is 0.0003º or a
person is 220m tall, check again!
DO NOT
……use a protractor to measuring an angle off the
diagram!
The question said "calculate" so the diagram probably
isn't even accurate.
……write probabilities as ratios or as “one in four
chance” always use fractions, decimals or percentages
……forget to square root at the end of Pythagoras
questions – check your answer
DO
……use a ruler to draw lines of best fit, to draw
transformations etc
……remember to write down the units when calculating
with measures
area = units2
volume = units3
……give your answer to the required degree of accuracy
if it says to 2dp, make sure you do!
What the words mean?
• Solve means ‘work out the value of…’
• Simplify means ‘make more simple…’
(will not necessarily be one number)
• Expand means multiply out the brackets, remember to
multiply everything inside the brackets by what is outside.
• Factorise means put the brackets back in by taking out the
highest common factor(s)
FORMULAE YOU NEED TO KNOW
This one is at the
front of your paper
Area of a triangle
½ base x height
Area of a parallelogram
base x height
Area of a trapezium
½(a + b) x height
Area of a rectangle
Height is always
perpendicular
height
where a is short side
and b is long side
length x width
Area of a circle
πr2
Remember
do
πxrxr
Circumference of a circle
(the perimeter of the circle)
πd or 2πr
THINGS THAT CONFUSE!
Mean - add them all up &
2x means two lots of x
divide by how many there are
Median - the middle value
x2 means x times x
3x2 means 3 lots of x times x
Mode – is the most
Modal group – group with most
in it
Range – highest value ‘take
away’ lowest value (actually work
it out!)
4/x means 4 divided by x
Multiples are numbers in another’s times
tables
Factors are whole numbers that divide exactly
into another
Prime number divisible only by itself and 1
Integer is a whole number (positive or
negative)