Add 3 Single Digits
3 Digits: http://www.ixl.com/math/grade-1/adding-three-numbers
Addition SCale (multiple addends) http://www.toytheater.com/addition-scale.php
Three 2Digits: http://www.ixl.com/math/grade-2/add-three-or-more-numbers-two-digits
Addition SCale (multiple addends) http://www.toytheater.com/addition-scale.php
Three 2Digits: http://www.ixl.com/math/grade-2/add-three-or-more-numbers-two-digits