Drowning Math vs Addition Algorithm

Solve fast or sink. Drowning Math turns mental arithmetic into a survival race: every right answer lifts you up, every mistake drags you under. How long can you stay afloat? THE DAILY CHALLENGE One board, the whole world. Everyone gets the same puzzles today — climb the daily leaderboard before it resets at midnight, and come back tomorrow for a fresh one. FIVE WAYS TO TRAIN • Classic — survive as long as you can; difficulty ramps as you climb • Chain — each answer becomes the start of the next problem • 60 Seconds — no lives, pure speed: score as much as you can before the clock runs out • Sudden Death — one life, no second chances • Training — no lives, no timers; practice at your own pace A REAL BRAIN WORKOUT Addition, subtraction and multiplication with smart distractor answers, so guessing never works. Sessions take under a minute — perfect for a coffee break or the bus. GLOBAL LEADERBOARDS One leaderboard per mode, plus a fresh Daily board every day. Beat your best, then beat the world. BUILT FOR SPEED No sign-up, no subscription, no lessons. Tap play and you're in — and an optional daily reminder keeps your streak alive. Who it's for: • Adults who want a quick daily mental math workout • Students prepping for exams or numerical job tests • Anyone who wants their brain sharper than their calculator Dive in — the water is rising. Today's board is waiting.

No ads now or ever! Addition Algorithm – Rigby Maths is an interactive app that teaches and reinforces the standard written (column) addition algorithm. Learners build answers one column at a time—focusing on place value, accuracy, and the correct method—so they don’t just “get the answer”, they understand how the answer is made. Across five levels, the difficulty grows from first-time algorithm practice, to carrying (regrouping/renaming), to larger place values, adding three numbers, and finally working with decimals (tenths and hundredths). The app includes guided “Learn” tutorials and an on-demand help feature with clear voice prompts, plus optional visual supports like a carry helper overlay, tens frames, and visual dots to make the maths more concrete. Progress is tracked with a mastery percentage per level, and the question wording is customisable—choose whether the app says “add” or “plus”, and whether it uses “carrying”, “renaming”, or “regrouping” to match what learners hear in class. It’s useful for independent practice at home and structured practice in schools, giving students confidence with the algorithm while giving adults a simple way to see steady improvement over time.