How to Round Numbers to the Nearest Hundred: A Step-by-Step Guide

Understanding Rounding to the Nearest Hundred

• 🎯 The goal of rounding to the nearest 100 is to simplify a number while keeping it close to its original value, resulting in the last two digits being zeros.
• 🔑 To round a number to the nearest hundred, identify the digit in the hundreds place.

The Rounding Rule: The Tens Digit

• 🔍 The key to deciding whether to round up or down is the digit in the tens place.
• 📉 If the tens digit is four or less, round down (keep the hundreds digit the same).
• 📈 If the tens digit is five or more, round up (increase the hundreds digit by one).

Applying the Rule: Examples

• 💡 For 136, the tens digit is 3 (four or less), so we round down to 100.
• 💡 For 258, the tens digit is 5 (five or more), so we round up to 300.
• 💡 For 342, the tens digit is 4 (four or less), so we round down to 300.

Rounding Larger Numbers

• 🚀 For 3,576, the tens digit is 7 (five or more), so we round up to 3,600.
• 🚀 For 4,218, the tens digit is 1 (four or less), so we round down to 4,200.
• 💡 For 18,876, the tens digit is 7 (five or more), so we round up to 18,900.
• 💡 For 35,67, the tens digit is 0 (four or less), so we round down to 35,600.