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Practice rounding numbers in this 3rd grade math mystery picture. Common Core 3.NBT.A.1. Fun, self-checking color-by-code activity.
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Printable Worksheet – PDF
Task Card Version – PDF
Google Forms – Digital Option
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Rounding Numbers – 3rd Grade Math Mystery Picture

Students review rounding numbers in this engaging math mystery picture activity.
They solve problems that involve rounding 2- and 4-digit numbers to the nearest ten or hundred, identifying midpoint values, and choosing appropriate endpoints.
This color-by-code task helps reinforce key skills while keeping students motivated and focused.
Includes 4 options: quick print one-pager, no-prep worksheet, task cards, and google forms
Aligned to: CCSS 3.NBT.A.1 · TEKS 3.2C · FL BEST 3.NSO.1.4

Grade Level: 3rd Grade
Resource Type: Digital Resources, No-Prep Worksheets
Resource Series: Mystery Pictures
Math Skills: Rounding Numbers

The hidden mystery picture reveals a message in a bottle floating at sea — a fun tie-in for ocean units

How the digital version works:

  • If the answer is correct, parts of the mystery picture are automatically colored.

  • If the answer is incorrect, students are prompted to try again before moving on.

  • Students can submit the form more than once, so be sure to ask them to only complete it once.

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