Fifth Grade Mathematics
Unit 7
Multiplying and Dividing Decimals

Printable Parent Letter

During Unit 7, your child will use the same place value understanding for adding and subtracting decimals that they used for adding and subtracting whole numbers.  Similarly, they will learn that the general methods used for computing products and quotients of whole numbers extend to computing the products and quotients of decimals, with the additional issue of placing the decimal point.
 

Students need to:

  • Multiply and divide decimals to hundredths, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between repeated addition and subtraction; relate the strategy to a written method and explain the reasoning used.
    • Multiply tenths by tenths or tenths by hundredths
    • Divide in problems involving tenths and hundredths

Carroll County Public Schools Video Support


Multiplying a Whole by a Decimal


Multiplying Decimals

Ways Parents Can Help

This is a skill that will be used heavily in secondary mathematics.  It is important for students to have an understanding of the concept and have the ability to visualize the algorithm of “shifting decimals.”  Look for opportunities for students to visually represent problems to prove computational accuracy.

Some Support Sites

 

 

Key Vocabulary to Know

Decimal

Digit

Place Value

Round

Tenth

Hundredth

Thousandth

Inverse Operation