Round decimals and mixed numbers

Key Notes :

1️⃣ What is Rounding?

• 🔹 Rounding means approximating a number to make it simpler but still close to its original value.
• 🔹 We round numbers to nearest whole number, tenth, hundredth, or fraction depending on the need.
• 📝 Example: 4.76 ≈ 4.8 (rounded to the nearest tenth)

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2️⃣ Rules for Rounding Decimals 🔢

1. ✅ Look at the digit to the right of the place you want to round.
2. ✨ If it’s 5 or more, add 1 to the digit you are rounding.
3. ❌ If it’s less than 5, keep the digit the same.
4. 🛑 Drop all digits after the rounded place.

📝 Example:

• Round 7.346 to the nearest tenth → 7.3
• Round 7.346 to the nearest hundredth → 7.35

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3️⃣ Rounding Mixed Numbers 🧮

A mixed number has a whole number + fraction.

🔹 Step 1: Convert the fraction to a decimal if needed.

🔹 Step 2: Round the decimal part using decimal rounding rules.

🔹 Step 3: Combine with the whole number.

📝 Example:

• 37/10​ → 3.7 → Rounded to nearest whole number → 4
• 23/8​ → 2.375 → Rounded to nearest tenth → 2.4

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4️⃣ Tips for Rounding Fractions ⚡

🔹 Compare the fraction to ½:

• Less than ½ → round down
• ½ or more → round up

📝 Example: 52/5 → 5.4 → Nearest whole → 5

📝 Example: 35/8​ → 3.625 → Nearest whole → 4

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5️⃣ Why Rounding is Useful? 💡

• Makes calculations easier 🧮
• Helps in estimating answers quickly ⏱️
• Useful in money, measurements, and daily life 💰📏

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6️⃣ Quick Emoji Reminder 🔔

• 🔢 Decimal → round using place values
• 🧮 Mixed number → convert fraction → round decimal
• ⬆️ 5 or more → round up
• ⬇️ Less than 5 → round down

Learn with an example

Let’s practice!🖊️