Lesson 19 Accuracy and errors
- Round the numbers in the table in two different ways.
For each find the ratio of error to the original number, as a percentage.
How good are the approximations?
2. John says ‘Rounding a large number to the first two places is the same as reading to the smaller marks in a number line like this’:
Write one of your approximations from question 1 on this number line. Label the larger markers only.
Is this helpful in understanding rounding?