Unit 4 Review

Front

What is rounding in mathematics?

Back

Rounding is the process of adjusting the digits of a number to make it simpler while keeping its value close to what it was. For example, rounding 787,638 to the nearest thousand gives 788,000.

Front

How do you calculate the duration of an event?

Back

To calculate the duration, subtract the start time from the end time. For example, if a play starts at 1:15 PM and ends at 3:30 PM, the duration is 2 hours and 15 minutes.

Front

What is the relationship between inches and feet?

Back

There are 12 inches in 1 foot. Therefore, to convert inches to feet, divide the number of inches by 12.

Front

What is the value of zero in mathematics?

Back

Zero is a number that represents no quantity. It is the integer that separates positive numbers from negative numbers.

Front

What is the nearest thousand to 787,638?

Back

The nearest thousand to 787,638 is 788,000.

Front

How do you fill in a missing number in a sequence?

Back

To fill in a missing number, identify the pattern in the sequence. For example, if the sequence is 5, __, 7, the missing number is 6.

Front

What does it mean to estimate a number?

Back

Estimating a number means finding a value that is close enough to the exact amount for practical purposes, often by rounding.

Front

What is the formula for finding the area of a rectangle?

Back

The area of a rectangle is found by multiplying its length by its width (Area = Length × Width).

Front

What is a time interval?

Back

A time interval is the amount of time between two events, measured in hours, minutes, or seconds.

Front

What is a number line?

Back

A number line is a straight line with numbers placed at equal intervals along its length, used to represent numbers visually.