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# Place value, even and odd numbers, Roman numerals, large numbers, and rounding: games and resources online

Place value   Even and odd numbers   Roman numerals   Big numbers   Rounding and estimating

## Place value

Tens and ones exercise
Enter the 2-digit number represented by ten-bags and one-balls.

E-manipulatives, including base 10 blocks
Use the stamp to place 100-flats, 10-rods, and 1-squares into a working space. Use the arrows in the columns to "move" (regroup) them to the other columns.
http://www.eduplace.com/kids/mw/manip/mn_3.html

Virtual Manipulative: Base 10 blocks
Place value up to thousands. The program gives you a number to make and you click on the 1000-cubes, 100-flats, 10-rods, and 1-cubes to make it. You can change the number base to work in base 2, base 3, etc.
nlvm.usu.edu/en/nav/frames_asid_152_g_1_t_1.html

#### Math Mammoth Place Value 1

A self-teaching worktext for 1st grade that covers forming ten-groups, filling the 100-chart, breaking numbers to tens & ones, and comparing.

Download (\$3.30). Also available as a printed copy.

=> Learn more and see the free samples!

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Maths Teacher's Toolkit
Includes place value calculator, place value cards, interactive number line, hundred square, and other interactive Flash resources.
www.crick.northants.sch.uk/Flash%20Studio/cfsmaths/Toolkit/Toolkit.htm

Place the Penguins
Practice breaking up the numbers into tens and ones, or into hundreds, tens and ones in this game.
www.bbc.co.uk/schools/starship/maths/placethepenguin.shtml

Place value puzzler
Place value or rounding game, click on asked place value in a number or type in asked rounding.
www.funbrain.com/tens/index.html

#### Math Mammoth Place Value 2

A self-teaching worktext for 2nd grade that covers hundreds, tens, and ones (three-digit numbers), number charts, skip-counting, comparing, and rounding.

Download \$2.25 or Pay What You Want!
Also available as a printed copy.

=> Learn more and see the free samples!

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Can you say really big numbers?
Enter a really big number, try say it out loud, and see it written.
www.mathcats.com/explore/reallybignumbers.htm

#### Math Mammoth Place Value 2

A self-teaching worktext for 2nd grade that covers hundreds, tens, and ones (three-digit numbers), number charts, skip-counting, comparing, and rounding.

Download \$2.25 or Pay What You Want!
Also available as a printed copy.

=> Learn more and see the free samples!

See more topical Math Mammoth books

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Place value payoff
Match numbers written in standard form with numbers written in expanded form in this game.
www.quia.com/mc/279741.html

Line Dry Game
Fill in a missing number on the clothes line based on different skip counting patterns.
www.fuelthebrain.com/Game/play.php?ID=15

Print these pages on cardstock to get your own base 10 blocks, rods, geometrical shapes, or algebra tiles (XY-blocks).
mason.gmu.edu/~mmankus/Handson/manipulatives.htm

#### Math Mammoth Place Value 3

A self-teaching worktext for 3rd grade that covers four-digit place value, mental addition & subtraction with four-digit numbers, comparing, rounding, and estimating.

Download (\$2.75). Also available as a printed copy.

=> Learn more and see the free samples!

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## Even & Odd Numbers

Fruit Shoot
Shoot a fruit with an even or odd number, whichever one your aim tells you. Three levels: 1-10, 1-20, and 1-100.
www.sheppardsoftware.com/mathgames/earlymath/Fruit_shoot_odd_even.htm

Odd or Even?
Drag and drop the number cards to their correct place in the diagram (even or odd). three difficulty levels (numbers 1-10, 1-30, or 1-100).
www.crickweb.co.uk/ks2numeracy-properties-and-ordering.html#

Story of Odd and Even
A simple story about two ladybugs named Odd and Even. It teaches even and odd within 1-10.
www.primarygames.com/storybooks/even_odd/1.htm

## Roman Numerals

Roman Numerals Tutorial
Good explanations of how numbers are formed using Roman Numerals, such as when to "add" or "subtract" the symbols. The page allows interactivity where the student can self-check his/her understanding.
www.beaconlearningcenter.com/weblessons/romannumerals/default.htm

Roman Numerals
This article includes charts, an interactive converter, explanation of the system, its history, modern use, and more.
knowtheromans.co.uk/Categories/SubCatagories/RomanNumerals/default.htm

Roman Matching Game
Drag the Roman numerals to the corresponding Arabic numerals. If you win the next game will be faster. See if you can beat the clock!
sln.fi.edu/time/keepers/Silverman/html/RomanMatch.html

Roman Numerals Worksheets
Generate worksheets for converting Roman numerals to normal (Arabic) ones, or normal numbers to Roman numerals, or do easy addition and subtraction problems with Roman numerals.
www.homeschoolmath.net/worksheets/roman_numerals.php

Roman Numerals Dot-to-Dots
Some dot-to-dot worksheets with animal themes that use Roman Numerals.
www.animaldottodots.com/romannumerals.php

Roman Numerals - Wikipedia
An article explaining the usage, origin, and a chart of Roman numerals.
en.wikipedia.org/wiki/Roman_numerals

Quia: Easy Roman Numerals
Translate Roman numerals into Arabic (covers I, V, and X only). Matching game, concentration, or word search.
www.quia.com/jg/66123.html

Roman Numerals - A Maths Webquest
A set of web pages where you can learn all about roman numerals: how they originated, how to read & write the numerals, and places we still use the Roman number system today.
www.greatmathsgames.com/roman_numerals/roman_numerals.htm

Roman Sequence Game
See how fast you can put these Roman numerals in the correct sequence.
www.fi.edu/time/keepers/Silverman/html/RomanSequence.html

## Big Numbers

Naming Numbers
These pages teach number naming skills covered in K8 math courses. Each page has an explanation, interactive practice and challenge games about naming numbers.
www.aaamath.com/B/nam.htm

Megapenny project
Visualizes big numbers with pictures of pennies.
www.kokogiak.com/megapenny/default.asp

Powers of ten
A 9-minute movie that illustrates the dramatic changes of scale when zooming in or out by powers of ten (40 powers of ten), starting from a picnic blanket and ending in the universe, and then starting from a hand to the proton inside an atom.

#### Math Mammoth Place Value 4

A self-teaching worktext for 3rd-4th grade that covers thousands, ten thousands, hundred thousands (place value to 6 digits), and also a little of millions.

Download (\$2.20). Also available as a printed copy.

=> Learn more and see the free samples!

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Practice naming big numbers.
www.funbrain.com/numwords/index.html

Keep My place
Fill in the big numbers to this cross-number puzzle.
www.counton.org/magnet/kaleidoscope2/Crossnumber

What does a TRILLION dollars look like?
A great visual of what a trillion dollars looks like (with 100-dollar bills).
www.pagetutor.com/trillion

#### Math Mammoth Place Value 5

A self-teaching worktext for 3rd-4th grade that covers trillions, place value, exponents, scientific notation, and using the calculator appropriately.

Download (\$2.20). Also available as a printed copy.

=> Learn more and see the free samples!

See more topical Math Mammoth books

## Rounding and estimating

Rounding to the Nearest Ten
A number line from 0 to 100 where you can illustrate to the students how to round numbers to nearest ten.
www.absorblearning.com/media/item.action?quick=mi

Rounding Sharks
You'll be asked to round numbers in the thousands to the nearest hundred. Click on the shark that has the correctly rounded number.
www.free-training-tutorial.com/rounding/sharks.html

Half-Court Rounding
Choose either "1 pointer," "two pointer," or "three pointer button". You're given a rounding problem to the nearest ten, nearest hundred, or nearest tenth. If you answer correctly, the character makes a basket.
www.mrnussbaum.com/halfcourt.htm

Rounding Master
A Mathionare-type game where you answer rounding questions, and try to become a Rounding Master Math Millionaire.
www.mrnussbaum.com/roundingmaster.htm

Soccer Math
Round decimals to whole numbers, and you'll get a chance to kick the ball to the goal.
www.math-play.com/rounding-decimals-game-1/rounding-decimals-game.html

Estimation
Exercises about rounding whole numbers and decimals, front-end estimation, estimating sums and differences.
www.aaamath.com/B/est.htm

Maximum Capacity
Drag as many gorillas as you can into the elevator without exceeding the weight capacity of the elevator. You will have to use your quick addition, estimation, and number sense skills.
www.mrnussbaum.com/maximumcapacity.htm

Home Run Derby Math
Estimate answers to math problems. The closer you get, the further your ball will fly at-bat. In addition and subtraction, the numbers are in the thousands. In multiplication, the numbers are in the hundreds.
mrnussbaum.com/derby