## Math Helpful Resources on the Internet

*Use these free online resources to supplement the “bookwork” as you see fit.*

**Base Blocks Addition**

A virtual manipulative that shows regrouping in addition. You can either solve addition problems that are provided, or create your own. “Lasso” with a mouse ten units, ten tens, or ten hundreds to regroup them. Choose “Columns = 2” to restrict the work to two-digit numbers.

http://nlvm.usu.edu/en/nav/frames_asid_154_g_1_t_1.html?from=category_g_1_t_1.html

**Base Blocks Subtraction**

A virtual manipulative that helps teach borrowing in subtraction. Choose "Create Problem", then click on the red and blue blocks to create a problem. The number to be subtracted (the subtrahend) is illustrated by the RED blocks whereas the minuend is by the BLUE blocks. Click BEGIN problem to start solving. Drag a red block on top of a blue to “subtract” —they cancel each other. Drag bigger place values to the column on their right to “break them up”—in other words regroup or borrow.

http://nlvm.usu.edu/en/nav/frames_asid_155_g_1_t_1.html?from=category_g_1_t_1.html

**Callum's Addition Pyramid**

Add the pairs of numbers to get a number on the next level and finally the top number.

Three difficulty levels.

http://www.amblesideprimary.com/ambleweb/mentalmaths/pyramid.html

**Techno Tortoise**

Practice adding two two-digit numbers in parts on a number line.

http://www.ictgames.com/technowithflock.html

**Mr. Martini's Classroom: Addition and Subtraction Inequalities**

Compare expressions that involve addition and subtraction of one and two-digit numbers.

**http://www.thegreatmartinicompany.com/inequalities/number-comparison.html**

and

http://www.thegreatmartinicompany.com/inequalities/add-subtract-comparison.html

**Mr. Martini's Classroom: Long Addition**

Practice adding two-digit numbers in columns online.

http://www.thegreatmartinicompany.com/longarithmetic/longaddition.html

**Mathionare Addition Quiz**

Answer increasingly more difficult addition questions (one and two-digit numbers), and win a million!

http://www.mathsisfun.com/games/mathionaire-addition-quiz.html

**Button Beach Challenge**

Figure out what number the various colored buttons represent.

http://www.amblesideprimary.com/ambleweb/mentalmaths/buttons.html

**Teaching Treasures - Year 2 Maths Worksheets**

Simple online addition and subtraction worksheets where the student types in the answer and can check it. http://www.teachingtreasures.com.au/maths/maths_level2.html

**Euclid's Game**

An online version of Euclid's game (a Java applet).

http://www.cut-the-knot.org/blue/EuclidAlg.shtml

**Count on Convict**

Practice “adding up” strategy for mental subtraction. First type the amount to move on to the next whole ten, then count on tens, then the rest.

http://www.ictgames.com/countonconvict.html

**Double Digit Addition**

Match the addition problem with the correct sum. Enjoy!

http://www.quia.com/mc/818288.html

**Addition Level 2**

A matching game where you add a one-digit number and a two-digit number.

http://www.quia.com/mc/65798.html

**Speed Grid Addition**

Find numbers on the grid that add up to the given number. This uses both single-digit and two-digit numbers.

http://www.oswego.org/ocsd-web/games/SpeedGrid/Addition/urikares.html