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

Winkler Mult Whole by Decimal
Multiplying a Whole by a Decimal

Winkler Mult Decimals
Multiplying Decimals

Multiply Decimals Arrays
Multiply Decimals with Models and Open Arrays

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



Place Value





Inverse Operation