Rounding and Estimation in GCSE & IGCSE Maths

This is how you can estimate calculations which is useful for checking answers! Rounding and estimation explained with formulas to follow! ▶ Get FREE complete revision notes on rounding & estimation HERE: https://bit.ly/3M4w03x Today, we’re showing you the fastest way to estimate calculations in our latest tutorial designed for all exam boards and those studying GCSE & IGCSE maths! We need to be able to round and estimate as estimation is especially useful for verifying answers in exams or when precise calculations are not necessary. This video shows you the fastest process of rounding numbers and applying them to simplify complex calculations that may crop up in your maths exams. PLUS, we’ve got actual worked examples based on GCSE past papers answers. What You Will Learn: ✅ Basics of Rounding Numbers: Understand how to round numbers to one significant figure for simpler computation. ✅ Applying Estimations: Learn how to use rounded numbers to estimate results in various mathematical operations. ✅ Identifying Overestimates and Underestimates: Discover how to determine if your calculation will result in an overestimate or an underestimate and why. After Watching This Video, You Will Be Able To: ✅ Use estimation to simplify complex calculations. ✅ Round numbers effectively according to the context of the problem. ✅ Predict whether an estimation will over or underestimate the result. 🧠 Top Facts To Remember: 🧠 The general rule for estimation is to round numbers to one significant figure, but exceptions apply based on ease of calculation. 🧠 Fractions get bigger when the numerator is larger and the denominator is smaller—useful for understanding the effect of rounding on calculations. 🧠 Estimating helps check the reasonableness of answers and is a quick method to approximate calculations in exams. Worked Examples in This Video: 🔹 Estimate Simple Multiplication and Division: Calculate an estimate for 62×9.7/16.1 using rounding techniques. 🔹 Complex Estimation for Batch Processing: Explore how to estimate the number of jars needed for 31 batches of marmalade, considering the total mass and the capacity of each jar. We hope this Rounding & Estimation video helped! Good luck on all your GCSE & IGCSE maths exams! 🔗 Don't forget to check out all our other fantastic revision resources at Save My Exams! ▶ Get YOUR FREE complete revision notes on rounding & estimation HERE: https://bit.ly/3M4w03x Chapters: 0:00 What you’ll learn 0:19 General rule - round numbers to 1 significant figure 0:50 Exceptions to the rule - More sensible or easier to round to something convenient 1:39 Calculating Fractions 1:58 Worked example 1 - 62 x 9.67 / 16.1 3:14 Worked example 2 - Work out an estimate for number of jars Join thousands of students excelling with our tailored revision resources. From detailed notes to past papers, we make exam preparation easy and stress-free. With FREE and paid plans: https://www.savemyexams.com/ 🌟 Videos to watch next:: ▶ Watch ALL our FREE GCSE & IGCSE maths revision videos HERE: https://www.youtube.com/watch?v=ez2a-tor3Cc&list=PL0XFEXc1GUEok25S27h9I9EOLytETC_35 ▶ Learn more about using your calculator to pass your exams: https://youtu.be/LvfhYbrY93o 🔗 Essential Resources: GCSE: https://www.savemyexams.com/gcse/ IGCSE: https://www.savemyexams.com/igcse/ A-Level: https://www.savemyexams.com/a-level/ IB: https://www.savemyexams.com/dp/ Subscribe for more FREE revision resources: https://www.youtube.com/channel/UCeUFexWB7xDcw91NzqO--bQ/ 🔔 Stay ahead in your studies: Like, Subscribe, and Ring the Bell for the latest exam prep videos. 📱 Connect with Us: ▶ TikTok: https://www.tiktok.com/@savemyexams ▶ X/Twitter: https://www.twitter.com/SaveMyExams/ ▶ Instagram: https://www.instagram.com/savemyexams/ ▶ Facebook: https://www.facebook.com/SaveMyExamsUK/ ABOUT SAVE MY EXAMS: Save My Exams helps you study effectively and get higher grades than you thought possible. Sign up to unlock full resources all for the cost of ONE cup of coffee per month!* Get affordable revision resources for GCSE, IGCSE, A Level and IB students Here: https://www.savemyexams.com/ #SaveMyExams #GCSESuccess #IGCSEPrep #ALevelAchievement