3rd Grade Rounding to the Nearest 10 & 100 Worksheets & Activities

Description

Bring energy and excitement to rounding with this 3rd Grade Rounding to the Nearest 10 and 100 Worksheets Unit! This resource introduces your students to a creative method for rounding numbers called “Screaming Mimmies.” It’s a foolproof strategy that helps struggling learners finally get rounding — no confusion, no frustration.

This resource is perfect for review after teaching traditional rounding methods like number lines and hundreds charts. Once students understand the basics, this method makes rounding stick — and turns it into a skill they can confidently use all year long.

The unit includes rounding to the nearest 10 and 100 worksheets, games, and activities designed to help all learners succeed, with over 200 pages of engaging math content.

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What’s Included in This 3rd Grade Math Unit

This rounding to the nearest 10 and 100 worksheets resource provides all the tools you need to teach rounding in a fun, memorable way:

Rounding Mini-Lesson:
Start with a full explanation of the Screaming Mimmies Method — a unique trick that makes rounding easy for students who struggle with number lines or place value concepts. The included teaching guide walks you step-by-step through introducing the method and modeling it with examples students will love.

10 Rounding Worksheets:
These worksheets provide extensive practice rounding to the nearest ten and hundred using the Screaming Mimmies strategy.
Students will:

• Practice rounding both two- and three-digit numbers

• Apply the Screaming Mimmies trick in multiple contexts

• Identify which numbers round up or down

• Review with a cumulative rounding worksheet to assess mastery

Emoji Math Sort:
Students decide whether rounding examples are correct by adding happy or frown emojis to each card. With 48 task cards, this activity offers quick, visual practice and instant feedback for students.

Rounding Sort:
Students pick up each “Screaming Mimmy” and sort it into the correct “house” based on what it rounds to. This activity helps reinforce recognition of rounding patterns and is perfect for small groups or math centers.

Game #1: Catch the Screaming Mimmies:
Students play this lively card game while rounding numbers to the nearest ten. They record their answers on a game board and race to complete the correct column first.

Game #2: Build a Robot Game:
Each player builds their own robot by earning pieces for correct rounding answers. The included chance cards add excitement and unpredictability — the first player to complete their robot wins!

Game #3: Whole-Class “Bucket Filler!” Game:
Turn rounding practice into a classroom event! Hang task cards around the room and have students travel to each one, solving rounding problems. Correct answers earn students tickets for a prize drawing, turning math review into a celebration.

All games and activities come in color and black-and-white versions, allowing for easy prep, differentiation, and reuse year after year.

Flexible Classroom Uses

This 3rd grade rounding unit can be used in a variety of classroom settings:

• Whole-group rounding lessons

• Small-group remediation or enrichment

• Math centers and independent practice

• Spiral review or intervention

• Homework or morning work

Whether you’re introducing a new rounding method or providing support for students who need extra help, this resource makes rounding fun, accessible, and engaging for all learners.

Standards Alignment

This rounding to the nearest 10 and 100 worksheets resource aligns with national and state standards:

Common Core:
3.NBT.1 – Use place value understanding to round whole numbers to the nearest 10 or 100.

Texas TEKS:
3.4B – Round to the nearest 10 or 100 or use compatible numbers to estimate solutions to addition and subtraction problems.
4.2D – Round whole numbers to a given place value through the hundred thousands place.
4.4G – Round to the nearest 10, 100, or 1,000 or use compatible numbers to estimate solutions involving whole numbers.

Florida B.E.S.T.:
MA.3.NSO.1.4 – Round whole numbers from 0 to 1,000 to the nearest 10 or 100.

Why Teachers Love This Resource

Teachers love the creativity and simplicity of the Screaming Mimmies Rounding Method! It helps students who struggled with traditional rounding strategies finally understand how rounding works — and remember it long-term.

The rounding to the nearest 10 and 100 worksheets walk students through each step, while the games like Catch the Screaming Mimmies and Build a Robot keep practice playful and interactive.

Teachers appreciate the low-prep format, ready-to-print activities, and built-in differentiation that makes this resource a lifesaver during rounding units. Students love the humor, energy, and hands-on learning — turning what’s often a tricky concept into one of their favorite lessons.

Save Time and Make Rounding Practice Fun

This 3rd Grade Math Unit is part of a complete, year-long series designed to make math engaging and easy to implement. Each unit includes interactive mini-lessons, worksheets, and games that turn key math skills into exciting learning experiences.

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• 3rd Grade Hands-On Math and Reading Activities
• 3rd Grade Math Mysteries
• 3rd Grade Math Task Cards