## Tools - Math 'Plausible Estimation' Estimates for a Million Tasks, Set #1

Estimates for a Million, Set #1 (solutions)
Estimating for Amazing Facts: Set #2 (solutions) || Set #3 (solutions)
Estimates for the USA, Set #4 (solutions)

Malcolm Swan
Mathematics Education
University of Nottingham
Malcolm.Swan@nottingham.ac.uk

Jim Ridgway
School of Education
University of Durham
Jim.Ridgway@durham.ac.uk

 The aim of this assessment is to provide the opportunity for you to: develop a chain of reasoning that will enable you to estimate quantities to an appropriate degree of accuracy choose suitable units for your estimate communicate the assumptions upon which your estimate is based.

1. Breathing
How many days would it take you to breathe a million times?

 Assumptions Reasoning

2. Paper Clips
Suppose a chain is made from a million paper clips. How far will it stretch?

 Assumptions Reasoning

3. The brick wall
 Suppose you use a million household bricks to build a wall four feet high. How long would the wall be?

 Assumptions Reasoning

4. The dripping faucet
 A faucet drips a million times. How many buckets will it fill?

 Assumptions Reasoning

5. Writing a million
 How long would it take you to write out all the numbers, from one to a million? Remember that some numbers have more digits than others!

 Assumptions Reasoning

Estimates for a Million, Set #1 (solutions)
Estimating for Amazing Facts: Set #2 (solutions) || Set #3 (solutions)
Estimates for the USA, Set #4 (solutions)

Introduction || Assessment Primer || Matching Goals to CATs || CATs || Tools || Resources

Search || Who We Are || Site Map || Meet the CL-1 Team || WebMaster || Copyright || Download
College Level One (CL-1) Home || Collaborative Learning || FLAG || Learning Through Technology || NISE