The following sites provide free online math tasks. Please review each site and monitor your child's online sessions.
Hooda Math: https//www.hoodamath.com/
Math Game Time: http://www.mathgametime.com/
Math Playground: https://www.mathplayground.com/
IXL Math: https://www.ixl.com/
Fun Brain: https://www.funbrain.com/
A Plus Math: https://www.varsitytutors.com/aplusmath
CoolMath4Kids: https://www.coolmath4kids.com/
ABCya: https://www.abcya.com/
Study Island: https://app.studyisland.com/cfw/login/