Everyone Gets Rounding WRONG! Fix It Now | Checkpoint - IGCSE - O-Level 2027 🔥
Mr Muhamed Torkey
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Everyone Gets Rounding WRONG! Fix It Now | Checkpoint - IGCSE - O-Level 2027 🔥
108 просмотров · 1 месяц назад
Mr Muhamed Torkey
603 подписчика
108 просмотров · 1 месяц назад
Welcome! In this video we explain Rounding in Maths step by step 🔢
Perfect for Year 8 Checkpoint, Year 9 Core, and Year 10 O-Level Edexcel students 👇
✅ What is Rounding and why it matters
✅ Rounding to decimal places
✅ Rounding to significant figures
✅ Estimation & Rounding in exam questions
✅ Solved examples in real exam style
Simplified and organized for all levels (Checkpoint – IGCSE – O-Level Edexcel) 2027, so you understand it right and score full marks 💯
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00:00 🎬 Intro: Rounding — the first topic in the course & why it matters
00:08 📌 What does "round" mean? Rounding = Approximating a number
00:16 💡 Example: the number 384.959 — how do we approximate it?
00:39 📌 Place value names — the foundation of rounding correctly
00:46 📌 Before the decimal point: from the left — Units / Ones
00:53 📌 Units = Ones = Whole Number (all the same meaning)
01:15 📌 Tens, then Hundreds, then Thousands
01:34 📌 After the decimal point — where students get confused most
01:42 📌 Tenth = 1 Decimal Place
01:51 📌 Hundredth = 2 Decimal Places
02:01 📌 "Over 10" = 0.1 and "Over 100" = 0.01
02:21 📌 Reading the digits after the decimal point (3 digits / 6 digits)
02:38 📌 Important note: zeros in 0.0037 — which ones matter
03:12 📌 The zeros that have no value at all in rounding
03:22 📌 Rule of the Dash: mark the digit you're rounding to
03:30 📌 Question types: "Round" vs "Round to"
03:39 📌 "Correct to the nearest…" — the same idea
03:57 📌 Ones = Whole Number = Units — all mean the same thing
04:21 💡 Example 1: round 3874 to the Ones — look at the next digit (5 or more → add 1)
04:41 💡 Answer: 3875 (and everything after becomes zero)
04:51 💡 Example 2: round to the Tens — next digit is 4 → keep it as it is
05:08 💡 Answer: 3870
05:29 💡 Example 3: round to the nearest Hundreds — next digit is 7 → add 1
05:44 💡 Answer: 3900 and everything after becomes zero
05:51 💡 Example 4: round to the Thousands — next digit is 8 → add 1
06:02 💡 Answer: 4000
06:16 💡 Example 5: round to 1 Decimal Place — 9 + 1 = 10 → carry over
06:26 💡 Answer: 3875.0 — and why you MUST write the zero
07:02 ⚠️ The zero rule: never drop it in this question type
07:11 💡 Quick review: round to the Thousands → 4000
07:44 📌 Harder questions (worth 2 marks) — these need the calculator
08:01 💡 Rule: solve each part separately first, then write the full answer
08:09 💡 Working out 2.6 − 9.8 ÷ 3.9 step by step on the calculator
08:47 ⚠️ Write every digit that appears — never shorten it
09:16 📌 Rounding to Significant Figures
09:25 📌 Key note: zero can never be a significant figure
09:33 💡 First significant figure → Answer: 0.0871
09:56 💡 More 2-mark calculator questions
10:12 💡 Intermediate value 3.4, then carry it into the next step → Answer: 1.9
10:39 💡 "Write all the digits" calculator questions
10:48 ⚠️ Never type the whole question into the calculator at once
10:56 💡 Work out 3.7 × 2.9 = 10.73 first
11:22 💡 Handling very large calculator numbers
11:48 💡 Next digit is 4 → keep as is: 3.4
11:58 💡 More 2-mark questions
12:06 💡 Solve the division part on its own
12:14 💡 Solving 24.1 ÷ (8.4 − 7.8) step by step
12:28 💡 Intermediate value 0.6 and continuing the calculation
12:36 💡 Answer 38.4 and the subtraction that follows
12:54 💡 Writing the full answer: 1.63
13:01 🏁 Outro: what to focus on and what to watch out for
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