Rounding Whole Numbers Using the Number Line (Part 1)

This video tutorial teaches how to round whole numbers using a number line. It demonstrates rounding the number 1425 to the nearest ten and hundred. For rounding to the nearest ten, the number line uses benchmarks of 10 with increments of 1, showing that 1425 rounds up to 1430. For rounding to the nearest hundred, benchmarks of 100 with increments of 10 are used, showing that 1425 rounds down to 1400.

What is the purpose of using a number line when rounding whole numbers?

• To multiply numbers

• To visualize the position of the number relative to benchmarks

• To divide numbers

• To perform addition and subtraction

When rounding 1425 to the nearest ten, which two benchmarks are used?

• 1410 and 1420

• 1420 and 1430

• 1400 and 1500

• 1430 and 1440

If a number is exactly in the middle of two benchmarks when rounding to the nearest ten, what should you do?

• Choose randomly between the two benchmarks

• Round up to the higher benchmark

• Do not round the number

• Round down to the lower benchmark

What are the benchmarks used when rounding 1425 to the nearest hundred?

• 1300 and 1400

• 1400 and 1500

• 1500 and 1600

• 1200 and 1300

When rounding 1425 to the nearest hundred, which benchmark is it closer to?

• 1450

• 1400

• 1500

• 1350