formulas to remember

Question 1

How do you work out the range of numbers?

Answer 1

• Biggest takeaway smallest

Question 2

How do you answer a mean and range comment question

Answer 2

• On average the weather was warmer in Endoch because (smaller number < bigger number)
• The tempature in Endoch was more consistent as ( smaller < bigger)

Question 3

How do you calculate an interquartile range?

Answer 3

• Quartile three takeaway Quartile one

Question 4

How do you work out reverse percentages?

Answer 4

• Subtraction
  20-100= 80%
  1%= 0.5625
  100%= £56.25
• Addition
  8+100= 108%
  1%= 3
  100%= £300

Question 5

What are the steps you take when adding fractions?

Answer 5

• Find a common number between the first fractions then times that number by both the fractioned numbers (only to one fraction)
• Add the whole numbers
• Times the numbers why the opposite denominator
• Then add the top numbers

Question 6

What are the steps taken when subtracting fractions?

Answer 6

• Take away the whole numbers
• Times all the numbers by the opposite denominator
• Take away the top numbers

Question 7

What are the steps taken when dividing fractions?

Answer 7

-