Rounding Decimals and Rules

This video tutorial covers the concept of rounding decimals, starting with basic examples and progressing to more advanced cases. It explains how to determine which number a decimal is closer to based on place value, using a number line for visualization. The tutorial also introduces formal rules for rounding, including special cases when a number is exactly in the middle. The video concludes with advanced examples, demonstrating rounding to various place values.

When rounding 2.54 to the tenths place, which number is it closer to?

• 2.45

• 2.55

• 2.6

• 2.5

What is the result of rounding 2.77 to the tenths place?

• 2.85

• 2.75

• 2.8

• 2.7

If a number is exactly in the middle when rounding, what is the rule?

• Round to the nearest even number

• Round to the nearest odd number

• Always round up

• Always round down

What is the rounded value of 8.75 to the tenths place?

• 8.7

• 8.8

• 8.75

• 8.9

What is the rounded value of 8.98 to the tenths place?

• 9.1

• 8.9

• 9.0

• 8.95

According to the formal rules, what should you do if the digit to the right of the rounding place is less than 5?

• Keep the same

• Round down

• Add one to the rounding place

• Round up

Using the formal rules, what is the rounded value of 12.1258 to the hundredths place?

• 12.14

• 12.15

• 12.12

• 12.13

What is the first step in the formal rules for rounding a decimal?

• Identify the round-off place value

• Check if the number is even

• Multiply by ten

• Add one to the last digit

What is the rounded value of 5.1249 to the tenths place?

• 5.13

• 5.12

• 5.2

• 5.1

When rounding 16.098274 to the ten-thousandths place, what is the result?

• 16.0982

• 16.0984

• 16.0983

• 16.0985