Math Playground
https://www.mathplayground.com/grade_2_games.html
Math Games
https://www.mathgames.com/grade2
ABCYA
http://www.abcya.com/second_grade_computers.htm
Funbrain Math
https://www.funbrain.com/math-zone
Education.com-- MONEY
https://www.education.com/games/money-math/