Estimation

Question 1

When doing calculations, what should you always estimate?

Answer 1

estimate the result with rounded figures before using a calculator

Question 2

If your estimated/ball park figure is close to the calculated value …

Answer 2

then you are right

Question 3

If your estimated / ball park figure is not that close, then….

Answer 3

check it again

Question 4

Calculate the ratio of 201, 118, 310

2 : 1 : 3

Answer 4

201 / 118 = 1.7
118 / 118 = 1
310 / 118 = 2.6

1.7 : 1 : 2.6

Question 5

What is the percentage change from A -> B?

201 = A
118 = B

Answer 5

Decrease of less than 50%