Eight questions challenge scholars to use mental math while multiplying whole numbers by powers of 10. A tool with bouncing decimals demonstrates how and where the decimal moves. Question types include several multiple-choice, a drag-and-drop, fill-in-the-blank, and open discussion. 

Concepts

multiplication, powers of 10, decimals, multiplying decimals, mental math, decimal points, multiplication whole numbers, whole numbers

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Additional Tags

math

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Instructional Ideas

• Have the link bookmarked for early finishers to quickly open and complete when time allows 
• Walk through the interactive with the class, think out loud and invite volunteers to assist in the problem-solving process 
• Assign the interactive for homework to give pupils the opportunity to practice their skills outside of school  

Classroom Considerations

• Remind pupils to reset the tool between problems 
• A free CK-12 account is required to access the interactive

Pros

• Equations are color-coded
• Answers are graded immediately—incorrect responses reveal correct answers 
• Questions are written clearly 

Cons

• None

Common Core

5.NBT.A.2