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

Place value

Tens and ones exercise
Enter the 2-digit number represented by ten-bags and one-balls.
www.dositey.com/2008/addsub/tenoneex.htm

Math Mammoth Place Value 1 - forming ten-groups - filling the 100-chart - break numbers to tens & ones - comparing Self-teaching workbook. See samples!

Base 10 blocks applet
Drag 100-flats, 10-rods, and 1-squares into a working space to learn and practice through hands-on manipulation and visualization basic arithmetic (including multiplication as an area).  Has a complete lesson plan on how to teach place value and four basic operations.
arcytech.org/java/b10blocks/b10blocks.html

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

Arithmetic Workshop Place Values Tool
Drag models of ones, tens, hundreds, or thousands to the workarea, group them, break them up, or practice any of the four operations using the same visual models.
www.iknowthat.com

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

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

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

Math Mammoth Place Value 2 - hundreds, tens, and ones - rounding - comparing A self-teaching workbook. Download free samples!

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

Hand made manipulatives
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

Maths Teacher's Toolkit
Includes place value calculator, place value cards, an interactive number line, a 100-square, and other interactive Flash resources.
www.crick.northants.sch.uk/Flash%20Studio/cfsmaths/Toolkit/Toolkit.htm

Online math tutors to help with math homework are available 24/7 at Tutor.com.

Roman Numerals

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 - 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 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
Illustrates the dramatic changes of scale when zooming in or out is by powers of ten.
microcosm.web.cern.ch/Microcosm/P10/english/welcome.html

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

Keep My place
Fill in the big numbers to this cross-number puzzle.
www.mathsyear2000.org/magnet/kaleidoscope2/Crossnumber/index.html

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/

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

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

Estimation at AAA Math
Exercises about rounding whole numbers and decimals, front-end estimation, estimating sums and differences. Each page has an explanation, interactive practice, and games.
www.aaamath.com/B/est.htm

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