13 Year Old Math Games
Math games for 13 year olds: swap tiles on a 3×3 grid until every row sums to 15. Free, instant play — use the game above.
Activity summary
13 Year Old Math Games. 13 year old math games online free. Addition puzzle — every row must sum to 15. 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
SumGrids is a 3×3 addition puzzle. Tap one tile, then another to swap. Numbers 1 through 9 appear once on the board. Row totals show on the right — when every row sums to 15, you win. You practice adding three numbers to reach 15 — the classic magic-square row target — while planning which swaps help the most.
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.