Common Core Math Games
Common Core math games that support addition fluency and making tens — skills used when building rows of 15.
Activity summary
Common Core Math Games. Common Core math games for addition fluency. Free sum-to-15 puzzle supports early number standards. SumGrids: free browser math game — 3×3 tile-swap puzzle (rows sum to 15) plus grade-level arithmetic worksheets.
How this puzzle builds math skills
Early grades emphasize addition within 20 and number sense. SumGrids repeats triple-addition to 15 in a problem-solving context.
Play free on this page
The game above loads instantly — no download or sign-up. After each win, start a new scrambled board. Wins and puzzles played are tracked in your browser.
Great for short practice sessions
Most puzzles take a few minutes. Use SumGrids as a warm-up before homework, a classroom station, or a quick brain break at home.
FAQ
Is SumGrids free?
Yes. Play free in your browser with no account required.
What is the goal?
Make all three rows sum to exactly 15 by swapping tiles.
Does progress save?
Wins and puzzles played save locally in your browser on this device.