Rounding Whole Numbers to the Nearest 100

This video tutorial explains how to round whole numbers to the nearest 100 using both a number line and formal rules. It provides several examples, including special cases where numbers fall exactly in the middle of two rounding options. The tutorial covers the process of identifying the rounding place value and the decision-making digit to determine whether to round up or down.

What is the primary method introduced for rounding whole numbers to the nearest 100?

• Using a calculator

• Using estimation

• Using a ruler

• Using a number line and formal rules

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When rounding 1,938 to the nearest 100, which two numbers is it between on the number line?

• 1,850 and 1,950

• 1,900 and 2,000

• 1,800 and 1,900

• 1,950 and 2,050

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According to the formal rules, what is the decision-making digit when rounding 1,938?

• The digit in the tens place

• The digit in the hundreds place

• The digit in the units place

• The digit in the thousands place

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CCSS.3.NBT.A.1

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When rounding 5,268 to the nearest 100, which number is it closer to?

• 5,200

• 5,250

• 5,350

• 5,300

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What is the decision-making digit when rounding 5,268 using formal rules?

• The digit in the hundreds place

• The digit in the tens place

• The digit in the units place

• The digit in the thousands place

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CCSS.3.NBT.A.1

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When rounding 42 to the nearest 100, what is the result?

• 0

• 100

• 50

• 10

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What is the special case rule when a number is exactly in the middle of two rounding options?

• Choose the higher number

• Choose the lower number

• Always round up

• Always round down

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When rounding 850 to the nearest 100, what is the result?

• 900

• 850

• 800

• 1,000

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What happens when you increase a 9 in the hundreds place by 1 during rounding?

• It becomes 10, and you add 1 to the thousands place

• It becomes 0, and you add 1 to the tens place

• It becomes 9, and you add 1 to the units place

• It becomes 8, and you add 1 to the hundreds place

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CCSS.3.NBT.A.1

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When rounding 3,975 to the nearest 100, which number is it closer to?

• 3,900

• 4,000

• 3,850

• 3,950

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