A bit overwhelming.
As much as possible I like to compliment and support what my girl is doing at school. Thus, card math.
What you need: A deck of cards with jokers and face cards removed and a large playing space.
Spread the cards out all over a table. Pick one card (for instance, a 7 of hearts). Now, have your child find other cards whose sum would be seven (a 3 and a 4; a 6 and a 1; a 5 and a 2, etc.).
With older kids you can modify this by using subtraction, division, multiplication, etc. For instance, pick a 7 and a 2 and have them be 72. What numbers multiplied equal 72? If you can't remember it's okay. You are a parent. Kid fog takes away math abilities.
To modify for younger children, have kids match numbers. You pick a 2, they find another 2.
Math can be fun.