Maths - what do you already know?

How do you find 25% of a number?

• Divide by 25

• Divide by 4

• Divide by 10 and double it

• Divide by 100, multiply by 25

How do you find 4/10 of a number?

• Divide it by 4

• Divide by the top and multiply by the bottom

• Divide by the bottom and multiply by the top

• Divide it by 10

How do you find the area of a 4 sided shape?

• Multiply all the sides

• Add all the sides

• Length x width x height

• Length x width

How do you find the area of a triangle?

• Half (length x width)

• Length x width

• Length x width and divide by 2

• Add all the sides

How do you find the mean average?

• Add all the numbers together and divide by how many

• Put the numbers in order and find the middle

• Find the number that appears the most

• Find the difference between the largest and smallest number

If you put a series of numbers in order and find the middle, what type of average have you found?

• Mean

• Median

• Mode

• Range

How do you find the area of a circle?

• pi x radius²

• Add up all the sides

• square the radius and multiply by pi

• Multiply the diameter by pi

How do you find the circumference of a circle?

• Pi x radius

• Radius x 3.14

• Measure it

• Diameter x 3.14

How do you find the perimeter of a shape?

• Add up all the sides

• Add up 2 sides and times by 2

• length x width

• length x width x height

How many degrees are there in a straight line?

• 90

• 360

• 180

• 100