Rounding Decimals to the Nearest Whole Number

This video tutorial teaches how to round decimals to the nearest whole number using a number line. It explains the concept of equivalent decimals and addresses common misunderstandings in rounding. Through examples, it demonstrates how to determine which whole number a decimal is closest to, including special cases where distances are equal. The tutorial concludes with a recap of the key concepts and a final example.

What is the purpose of rounding numbers?

• To increase the precision of a number

• To make calculations more complex

• To simplify calculations and decision-making

• To substitute a number with a less friendly one

What is a common mistake students make when dividing a number line for tenths?

• Using 10 tick marks to create 9 parts

• Using 11 tick marks to create 10 parts

• Using 10 tick marks to create 11 parts

• Using 9 tick marks to create 11 parts

How should 3 and 4/10 be rounded to the nearest whole number?

• It rounds down to 3

• It rounds up to 4

• It stays as 3 and 4/10

• It rounds up to 5

When rounding 7 and 65/100, which whole number is it closest to?

• 7

• 6

• 8

• 9

What rule do mathematicians use when a decimal is exactly halfway between two whole numbers?

• Always round up

• Always round down

• Round to the nearest even number

• Round to the nearest odd number

How should 2 and 50/100 be rounded to the nearest whole number?

• It stays as 2 and 50/100

• It rounds up to 4

• It rounds down to 2

• It rounds up to 3

In the final example, what whole number is 45 and 38/100 closest to?

• 45

• 46

• 44

• 47