#1.8A
round integers to a given power of 10
#1.8B
round to a given number of significant figures or decimal places
#1.8C
identify upper and lower bounds where values are given to a degree of accuracy
#1.8D
use estimation to evaluate approximations to numerical calculations
By rounding values to 1 significant figure
#1.8E
solve problems using upper and lower bounds where values are given to a degree of accuracy
The dimensions of a rectangle are 12 cm and 8 cm to the nearest cm. Calculate, to 3 significant figures, the smallest possible area as a percentage of the largest possible area