Welcome! Today we will learn how to estimate and round numbers. It is like finding a friendly neighbor on a number line!
Rounding helps us make numbers simpler to work with in our heads. We look for the nearest ten, hundred, or thousand to find a quick, close answer.
When rounding to the nearest ten, look at the ones digit. If it is 5 or more, we round up. If it is 4 or less, we round down.
We can use digital tools like search engines or dictionaries to check math terms. For example, looking up 'syllabication' shows us how to break words into parts.
We can practice writing our math notes in neat, cursive handwriting. Let's trace a smooth, flowing loop to train our hands for beautiful writing.
✏️ Worked example
Round the number 37 to the nearest ten.
Find the tens place in 37. The digit is 3, which means 30.
Look at the digit to its right, which is the ones place. The digit is 7.
Compare 7 to the number 5. Since 7 is greater than or equal to 5, we must round up.
Add 1 to the tens digit, changing 3 to 4. Change the ones digit to 0.
The rounded number is 40.
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