Mon Sep 10th - More work on Estimating answers using rounding to 1 significant figure

LEARNING OBJECTIVE: To be able to round numbers to 1 significant figure and then work out an estimate to the exact answer
SUCCESS CRITERIA: You will bea bale to round a number to 1 significant figure and then use this to find an approximationte answer to the original sum

ENGAGEMENT ACTIVITY: 
Round the following numbers to 1 significant figure

1. 345
2. 2786
3. 67.8
4. 4.7
5. 0.356
6. 280.56
7. 0.00678
8. 0.3089

Now work out these sums

1. 20 x 40
2. 500 x 20
3. 300 x 0.2
4. 4000 x 0.03
5. 3000 x 6000
6. 50000 x 0.0003

LESSON: 
Quick reminder on how to round to 1 sig fig and then find approximate answers to these These Questions

EXTENSION: Using a calculator work out the exact answer to all the questions

PLENARIES: Reacting to Responses from Students (individually and collectively) Supporting around the classroom, giving students answersm to self mark their work.