Websites to Practice Missing Addends
Finding the missing addend in an addition problem proves to be very difficult for some children. I have listed some websites that provide online practice with finding the missing addend.
http://www.sheppardsoftware.com/mathgames/matching/AdditionX.htm
http://www.fuelthebrain.com/games/ace-of-numbers/
http://www.roomrecess.com/pages/AlienAddends.html
http://www.onlinemathlearning.com/grade-1.html#Addition
The following websites can be used for basic facts practice.
http://www.abcya.com/first grade computers.htm
http://www.factmonster.com/math/flashcards
http://www.playkidsgames.com/games/mathfact/mathFact.htm
http://www.homeschoolmath.net/online/math facts.php (This site provides links to numerous other sites for facts practice.)
Please feel free to contact me with any questions you may have regarding this skill.