Learning Objectives
Beginning
To be able to explain a method for rounding decimal numbers to a specific number of places.
How do we round 1.27 to one decimal place?
Developing
To be able to demonstrate how to round numbers to a given number of significant figures.
How do we round 1.27 to 2 significant figures?
Mastering
To be able to demonstrate how to estimate the values of calculations involving positive numbers greater than one.
What is your estimate of (12.5 x 1.23)/12.3 and how did you work this out?
Resources
Beginning
Mastering
We will start by looking at rounding numbers the nearest 1, 10, 100 or 1000. If you need some help take a look at this video: Rounding
Ten Ticks - 4, 3, page 7
We now move on to looking at rounding numbers to a set number of decimal places. If you need some help take a look at this video: Decimals Points and Significant Figures (first half).
Ten Ticks - 6, 3, page 19 (top of page)
Stick on Maths
NNS 2 - Rounding Decimals and Ordering Negatives
Ten Ticks - 4, 3, page 7
We now move on to looking at rounding numbers to a set number of decimal places. If you need some help take a look at this video: Decimals Points and Significant Figures (first half).
Stick on Maths
NNS 2 - Rounding Decimals and Ordering Negatives
Developing
We now move on to looking at rounding numbers to a set number of significant figures. If you need some help take a look at this video: Decimals Points and Significant Figures (second half).
Mastering
Finally we look at estimating calculations. If you need some help take a look at this video: Estimation , Rounding and Estimation
