Round to the Nearest Ten Using Distance

Supplied materials

• Paper and a pencil; drawing and spoken explanations are welcome. An adult may read directions and options aloud.
• Supplied worked-case record: Round 263 to the nearest ten.
• All quantities and shape descriptions are supplied in the worked example and questions; no purchase or personal information is needed.

Learn the idea

Rounding to a ten compares the two neighboring multiples of ten. Choose the closer landmark. In this course, a whole number exactly halfway rounds to the higher ten. The rounded value is an approximation and should be labeled as such when an exact count is needed.

Find the lower and upper tens around the supplied number. Compare its distance from each. Choose the nearest, using the stated upward midpoint convention, and explain the selection with a short number-line model.

Identify both neighboring tens, not only the smaller one. A rounded number is approximate; it does not change the original exact count. Mark the value between its two neighboring multiples of ten.

1. Mark the value between its two neighboring multiples of ten.
2. Follow the worked example. Point to each number or shape feature and say what it tells you.
3. Find the lower and upper tens around the supplied number.
4. Try the question and then the three practice questions. Check your answers and explain any change you make.

Check your reasoning

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Take it further

Round 378 and 385 to tens. Expected: 380 and 390.

Nothing here is saved to an account or sent to a teacher. The answer download includes your current choice and any checked feedback. It does not include choices from the separate More practice section. Download that section separately.