4th Grade Math Review

Front

What is a multiple?

Back

A multiple of a number is the result of multiplying that number by an integer. For example, multiples of 6 include 6, 12, 18, etc.

Front

What is a factor?

Back

A factor of a number is a whole number that can be divided evenly into that number. For example, 4 is a factor of 20 because 20 ÷ 4 = 5.

Front

How do you calculate the duration of an event?

Back

To find the duration, subtract the start time from the end time. For example, if a movie starts at 6:45 and ends at 8:25, the duration is 1 hour and 40 minutes.

Front

What is the formula for the perimeter of a rectangle?

Back

The perimeter of a rectangle is calculated by adding the lengths of all sides: P = 2(length + width).

Front

If a pizza has 16 slices and half is eaten, how many slices are left?

Back

If half of the pizza is eaten, then 8 slices are left (16 ÷ 2 = 8).

Front

What is the perimeter of a square?

Back

The perimeter of a square is calculated by multiplying one side length by 4: P = 4 × side length.

Front

What is the difference between a multiple and a factor?

Back

A multiple is the result of multiplying a number, while a factor is a number that divides another number evenly.

Front

How do you find the total time from start to end?

Back

To find the total time, convert the start and end times to minutes, subtract the start from the end, and convert back to hours and minutes.

Front

What is the area of a rectangle?

Back

The area of a rectangle is calculated by multiplying the length by the width: A = length × width.

Front

What does it mean to eat half of something?

Back

Eating half means consuming 50% of the total amount. For example, if there are 16 slices, eating half means eating 8 slices.