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Third Grade
Math
Using Rounding Up or Down to Estimate an Answer

Worksheet

Using Rounding Up or Down to Estimate an Answer

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by Caitlin Hardeman

Rounding numbers can be tricky. Teach your third graders the rhyme: five or more up the score, four or less let it rest. This will help students when they are rounding any number from tens to thousands. For example, when 45 is rounded to the nearest ten, it is 50. Five or more up the score!

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Grade
Third Grade
Subject
Math
Standards
3.NBT.A.1, 3.NBT.A.2
Standards
Mathematics

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Guided Lesson: Number Sense 3

Guided Lessons are a sequence of interactive digital games, worksheets, and other activities that guide learners through different concepts and skills. They keep track of your progress and help you study smarter, step by step.
Guided Lessons are digital games and exercises that keep track of your progress and help you study smarter, step by step.
Understanding how our ten number system works enables students to see interesting and useful patterns and relationships in these math activities. These patterns allow students to develop more efficient mental math strategies when multiplying by multiples of 10 or 100. Students will also review rounding and apply this skill to larger numbers - up to 100,000’s place.
Understanding how our ten number system works enables students to see interesting and useful patterns and relationships in these math activities.
This lesson includes printable activities:
Exercise: Find the Factors of Prime and Composite Numbers
Exercise: Place Value and the Thousands Place
Game: Floyd Danger: Comparing Multi-Digit Numbers Game
Exercise: Comparing Multi-Digit Numbers
Exercise: Place Value and Multiplicative Comparisons
Exercise: Multiply by Multiples of Ten
Exercise: Place Value Up to Hundred Thousands Place
Exercise: Place Value Up to Ten Thousands Place
Game: Multiplying by 100s: Moving Truck Multiplication
Exercise: Place Value and Numbers in Expanded Form
Exercise: Rounding Multi-Digit Numbers to the Nearest 1,000
Exercise: Rounding Multi-Digit Numbers to the Nearest 10000
Exercise: Rounding Multi-Digit Numbers to the Nearest 100,000
Exercise: Comparing Decimal Numbers
Exercise: Ordering Decimal Numbers

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