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Aitchison College Academic Resources.
E1.9 Estimation
1 Round values to a specified degree of accuracy.
2 Make estimates for calculations involving
numbers, quantities and measurements.
3 Round answers to a reasonable degree of
accuracy in the context of a given problem.
E1410 Limits of accuracy
1 Give upper and lower bounds for data rounded
to a specified accuracy.
2 Find upper and lower bounds of the results of
calculations which have used data rounded to a
specified accuracy.
£1.11 Ratio and proportion
Understand and use ratio and proportion to:
*® give ratios in their simplest form
e divide a quantity in a given ratio
® use proportional reasoning and ratios in
context.
Notes and examples
Includes decimal places and significant figures.
@.g. write 5764 correct to the nearest thousand.
e.g. by writing each number correct to 1 significant
figure, estimate the value of
413
9.79 x 0.765 ~
Notes and examples
@.g. write down the upper bound of a length
measured correct to the nearest metre.
Example calculations include:
e calculate the upper bound of the perimeter
or the area of a rectangle given dimensions
measured to the nearest centimetre
e find the lower bound of the speed given
rounded values of distance and time.
Notes and examples
@.g. 20:30: 40 in its simplest form is 2:3:4.
@.g. adapt recipes; use map scales; determine best
value.