A fun game to practice addition up to 1000 is the French card game “Mille Bornes” (same name for the US version, available online).
Not sure if you are familiar to this game or not but basically, each player pretends to be on a road race, and the first one to complete 1000 kilometers (or 1000 bornes) wins the race. Players do so by displaying borne cards (25, 50, 100 and 200 kilometers), stopping others with a red light, a speed limit, a flat tire, etc. Quite fun. I loved it as a kid. And my 7 year old child seems to enjoy it a lot to.
But I am sharing it here because it is an easy way to practice … math: adding 25s, 50s, 75s, 100s and 200s to reach 1000, here we go.
Quick tip if you play with a child not quite yet familiar with a 4 digit number, try to use a base Ten blocks. It is quite helpful, indeed, and so instructive in discovering such a BIG number. We use a Thousand block as a reference. As my child displays borne cards, she sees, thanks to the Thousand block, how far she has left to race, adding Hundreds, Tens and Ones blocks until she can trade them for the Thousand block. And win !