Unit 3: Multiplying Whole Numbers and Decimals

Front

What is multiplication?

Back

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

Front

What is a whole number?

Back

Whole numbers are non-negative numbers without fractions or decimals. They include 0, 1, 2, 3, and so on.

Front

What is a decimal?

Back

A decimal is a fraction expressed in a special form. It uses a decimal point to separate the whole number part from the fractional part, such as 0.5 or 2.75.

Front

How do you multiply a whole number by a whole number?

Back

To multiply a whole number by another whole number, you can use repeated addition or the multiplication table. For example, 5 × 3 = 15.

Front

How do you multiply a whole number by a decimal?

Back

To multiply a whole number by a decimal, multiply as if they are both whole numbers, then place the decimal point in the product based on the number of decimal places in the decimal.

Front

What is the product of 0.3 and 0.7?

Back

0.3 × 0.7 = 0.21.

Front

What is the equation to find how many pictures Tara has if she has 8 times as many as Rita?

Back

The equation is 124 × 8 = p, where p is the number of pictures Tara has.

Front

What is a partial product?

Back

A partial product is the result of multiplying a single digit of one factor by the entire other factor in a multiplication problem.

Front

How do you find the total gallons of water if there are 28 tanks each holding 305 gallons?

Back

Multiply the number of tanks by the gallons each tank holds: 28 × 305 = 8,540 gallons.

Front

What does it mean to multiply by 7?

Back

Multiplying by 7 means adding a number to itself 7 times. For example, 4 × 7 = 4 + 4 + 4 + 4 + 4 + 4 + 4 = 28.