Boost mental-math skills with an interactive that focuses on dividing whole numbers by powers of 10. Mathematicians solve five fill-in-the-blank and multiple-choice questions with help from a moveable decimal point in four example equations. Peers discuss division rules.  

Concepts

mental math, division, powers of 10, decimals, decimal points

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Additional Tags

math

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Instructional Ideas

• Provide a word bank for fill-in-the-blank questions 
• Assign the link as a warm-up before direct instruction
• Direct learners to answer the discussion question on a sheet of paper, when everyone has had the chance to complete the interactive, come back together as a class to discuss it

Classroom Considerations

• A free CK-12 account is required to access the interactive 
• Participants should be familiar with division and powers of 10

Pros

• The decimal points stand out in a bright red color 
• Questions are written clearly 

Cons

• The decimal point does not move smoothly 

Common Core

5.NBT.A.2