Review: Multiplying and Dividing Whole Numbers

Front

What is multiplication?

Back

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

Front

What is division?

Back

Division is a mathematical operation that represents the process of splitting a number into equal parts. For example, 12 ÷ 3 means splitting 12 into 3 equal parts, which equals 4.

Front

How do you find the remainder in division?

Back

The remainder is what is left over after division when a number cannot be divided evenly. For example, in 10 ÷ 3, the quotient is 3 and the remainder is 1.

Front

What is the relationship between multiplication and division?

Back

Multiplication and division are inverse operations. If a x b = c, then c ÷ b = a and c ÷ a = b.

Front

How do you multiply a number by 10?

Back

To multiply a number by 10, simply add a zero to the end of that number. For example, 5 x 10 = 50.

Front

What is the product of 38 and 15?

Back

The product of 38 and 15 is 570.

Front

How do you divide a number by 10?

Back

To divide a number by 10, move the decimal point one place to the left. For example, 50 ÷ 10 = 5.

Front

What is the total number of prizes left after dividing 985 by 30?

Back

After dividing 985 by 30, there are 25 prizes left.

Front

How do you calculate the total calories in multiple items?

Back

To find the total calories in multiple items, multiply the calories in one item by the number of items. For example, 105 calories in one banana x 12 bananas = 1,260 calories.

Front

What does the expression 40 x 3 + 6 represent?

Back

The expression 40 x 3 + 6 represents a way to check the solution to the division problem 126 ÷ 3.