 # Multiply Decimals using Estimation

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Lesson Plans and Worksheets for Grade 5
Lesson Plans and Worksheets for all Grades

Examples, solutions, videos and lessons to help Grade 5 students learn how to multiply a decimal fraction by single-digit whole numbers, including using estimation to confirm the placement of the decimal point.

New York State Common Core Math Module 1, Grade 5, Lesson 12

Grade 5 Module 1 Lesson 12 Concept Development

Problems 1 - 3
31 x 4 =
3.1 x 4 =
0.31 x 4 =
Problem 10:
0.733 x 4 =
Grade 5 Module 1 Lesson 12 Exit Ticket
Multiply a decimal fraction by a single digit whole numbers

1. Use estimation to choose the correct value for each expression.
a. 5.1 x 2 0.102 1.02 10.2 102
b. 4 x 8.93 3.572 35.72 357.2 3572

Lesson 12 Homework

1. Choose the reasonable product for each expression. Explain your thinking in the spaces below using words, pictures, and numbers.
a. 2.1 x 3
0.63, 6.3, 63, 630
2. Yi Ting weighs 8.3 kg. Her older brother is 4 times as heavy as her. How much does her older brother’s weight in kg?
This video demonstrates the use of an area model, place value chart, and a tape diagram. Lesson 12 Homework

3. Tim is painting his storage shed. He buys 4 gallons of white paint and 3 gallons of blue paint. If each gallon of white paint costs \$15.72 and each gallon of blue paints is \$21.87, how much will Tim spend in all on paint?

Try the free Mathway calculator and problem solver below to practice various math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.  