Solve the sum
Look at the addition question at the top of the scene. Take a moment to work out your answer.
Maths under the sea · For iPhone
Little sums. Big underwater adventures.
Turn addition practice into a treasure hunt. Find the right answer bubble, swim with your mermaid, and earn treasure to make the ocean your own.
Correct answer? +1 treasure!
Think. Tap. Swim.
Simple controls bring addition practice to life beneath the waves.
Look at the addition question at the top of the scene. Take a moment to work out your answer.
Find the bubble with your answer and give it a tap. Your mermaid will swim to the bubble you choose.
Each correct answer earns one treasure. Spend it on different backgrounds, mermaids, and underwater friends.
Correct answers earn 1 treasure. Incorrect answers lose 1 treasure.

Treasure worth swimming for
Put your hard-earned treasure to work. Choose between two mermaids and add up to six different sea friends to keep you company while you practice.

A change of sea-nery
Swim among sunlit ruins, explore mysterious caverns, or settle into an underwater forest. Use treasure to change between eight backgrounds and give your next practice session a fresh setting.
A peek beneath the waves
From your first answer bubble to a sea full of friends, take a closer look at Mermaid Maths.
Scroll through the screenshots. Select one to explore it full size.
Dive into additionFind the answer bubble among the underwater ruins.
Bring a friend alongPractice your sums with a shark swimming beside you.
Meet your sea friendsChoose your mermaid and companions in the shop.
Find your favorite oceanChoose from eight different underwater backgrounds.
Your adventure starts hereA colorful underwater welcome to Mermaid Maths.
Your next adventure adds up
Pick your mermaid. Find your answer. See where a little practice takes you.