This exam tips covers Common Mistakes and How to Avoid Them within Place Value & Ordering for GCSE Mathematics. Revise Place Value & Ordering in Number for GCSE Mathematics with 13 exam-style questions and 22 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 9 of 13 in this topic. Treat this as a marking guide for what examiners are looking for, not just a fact list.
Common Mistakes and How to Avoid Them
❌ "Longer decimals are bigger"
Students often think 0.8 < 0.75 because 75 > 8
Fix: Always line up decimal points! 0.8 = 0.80, and 80 > 75
❌ "Negative numbers work like positive numbers"
Students might think -8 > -3 because 8 > 3
Fix: Remember the number line! -3 is closer to zero, so -3 > -8
❌ "Forgetting zero as a placeholder"
Writing "three thousand and five" as 35 instead of 3005
Fix: Use zeros to hold empty place value positions!
❌ "Confusion between tenths and tens"
Mixing up 0.7 (seven tenths) with 70 (seven tens)
Fix: The decimal point is the key! Left = whole, right = parts
Practice questions for Place Value & Ordering
What is the value of the digit 7 in the number 47,362?
Write these numbers in order from smallest to largest: -3.2, 0.8, -1.5, -3.25, 0