New Tools

Explore subtraction by first reaching ten, then subtracting the remainder. Adjust the numbers and follow the counters and equation step by step.

Split a teen number into ten and extra ones. Subtract from the ten-frame, then combine the remaining counters to find the difference.

Use ten-frames to explore make-ten addition. Split an addend, fill the first ten, and combine the remaining counters step by step.

Move and rotate falling blocks on a 10×20 board. Clear rows, preview the next piece, and play with keyboard or touch controls.

Steer the snake, collect food, and avoid walls and obstacles. Choose three difficulty levels and use keyboard, swipe, or touch buttons.

Play Chinese chess online in local two-player or simple computer mode, with legal-move hints, undo, and restart controls.

Explore six face turns on a virtual 3×3 cube, scramble the board, undo moves, and restore the cube by reversing the current move history.

Arrange seven tangram pieces on an open board. Drag, rotate, flip, shuffle, and reset pieces to create your own shapes.

Play the classic Sokoban puzzle game online with multiple levels, keyboard and touch controls, move and push tracking, unlimited undo, and instant restarts.

Play a sliding number puzzle online with solvable 3×3, 4×4, and 5×5 boards, move and time tracking, keyboard controls, and multi-step undo.

Play the free 2048 number puzzle online with arrow keys, WASD, swipe controls, undo, live scoring, and a locally saved high score.

Create reproducible mazes by size, algorithm, exit layout, and seed. View the shortest path or distance heatmap, play online, and download as SVG.

Enter a supported type, draw number, and ticket numbers for an auxiliary prize check.

Look up service-returned Chinese lottery draw records by type, issue or date.

View one published draw by lottery type and optional draw number.

Screen one image for watermarks, QR codes, barcodes, mini-program codes, and related ad signals.

Upload one K–12 homework or worksheet image to receive question-level status, reasons, and task statistics.

Browse service-returned recent draw records for supported Chinese welfare and sports lottery types.

Upload one image to screen for possible editing and inspect confidence, regions, and a heatmap.

Enter a company name, unified social credit code, registration number, or former name to retrieve returned company-relationship information. The result is informational only and is not a legal, investment, credit, or due-diligence conclusion.