5th - Decimal Multiplication

Front

What is decimal multiplication?

Back

Decimal multiplication is the process of multiplying numbers that have decimal points. It involves aligning the numbers, ignoring the decimal points during multiplication, and then placing the decimal point in the product based on the total number of decimal places in the factors.

Tags

CCSS.6.NS.B.3

Front

How do you multiply a whole number by a decimal?

Back

To multiply a whole number by a decimal, multiply as if the decimal is not there, then place the decimal point in the product. The decimal point is placed so that the total number of decimal places in the product equals the total number of decimal places in the factors.

Tags

CCSS.5.NBT.B.7

Front

What is the product of 0.3 and 0.5?

Back

0.15

Tags

CCSS.6.NS.B.3

Front

What is the product of 1.2 and 2.1?

Back

2.52

Tags

CCSS.6.NS.B.3

Front

What is the product of 45.1 and 7?

Back

315.7

Tags

CCSS.6.NS.B.3

Front

What is the product of 8.54 and 3.27?

Back

27.9258

Tags

CCSS.6.NS.B.3

Front

When multiplying decimals, how do you determine the placement of the decimal point in the answer?

Back

Count the total number of decimal places in both factors. The decimal point in the product should be placed so that it has the same number of decimal places.

Tags

CCSS.5.NBT.B.7

Front

What is the first step in multiplying two decimal numbers?

Back

The first step is to ignore the decimal points and multiply the numbers as if they were whole numbers.

Tags

CCSS.5.NBT.B.7

Front

What is the product of 107 and 28?

Back

2,996

Tags

CCSS.4.NBT.B.5

Front

What is the importance of lining up decimal points in multiplication?

Back

Lining up decimal points is important for addition and subtraction, but in multiplication, you multiply without aligning them. The placement of the decimal point in the final answer is what matters.

Tags

CCSS.5.NBT.B.7