4.OA.1 4.OA.2

Front

What is multiplication?

Back

Multiplication is a mathematical operation that represents the repeated addition of a number. For example, 3 times 4 means adding 3 four times (3 + 3 + 3 + 3 = 12).

Front

What does it mean to find a number that is a multiple of another number?

Back

A multiple of a number is the product of that number and an integer. For example, multiples of 5 include 5, 10, 15, 20, etc.

Front

If a pen costs $6, how much does 5 pens cost?

Back

5 pens cost $30 (5 x 6 = 30).

Front

What is division?

Back

Division is a mathematical operation that splits a number into equal parts. For example, 12 divided by 3 means splitting 12 into 3 equal parts, which equals 4.

Front

If Jean caught 12 fish and caught 3 times as many as Jamal, how do you find out how many fish Jamal caught?

Back

To find out how many fish Jamal caught, divide the number of fish Jean caught by 3. So, 12 ÷ 3 = 4.

Front

What is a ratio?

Back

A ratio is a comparison of two quantities. For example, if there are 2 apples and 3 oranges, the ratio of apples to oranges is 2:3.

Front

How do you calculate the total cost of items on sale?

Back

To calculate the total cost, multiply the price of one item by the number of items. For example, if one book costs $10 and you buy 3, the total cost is 10 x 3 = $30.

Front

What is the relationship between multiplication and division?

Back

Multiplication and division are inverse operations. If you multiply a number by another, you can divide the product by one of those numbers to get the other.

Front

If a history book has 3 times as many pages as a novel with 78 pages, how do you find the number of pages in the history book?

Back

Multiply the number of pages in the novel by 3. So, 78 x 3 = 234.

Front

What is a word problem in mathematics?

Back

A word problem is a mathematical question presented in a narrative form, requiring interpretation and problem-solving skills to find the answer.