Setting up the board…
Take your time — nothing here can go wrong, and you can always try again.
Ready?
Decimal Addition
Take your time — nothing here can go wrong, and you can always try again.
Full screen — no distractions
Frequently Asked Questions
- What is "Decimal Addition" and how do you play it?
- Decimal Addition is a free, interactive mathematics game designed for 5th Grade students. Pour decimal amounts of water, one after another, and read the total. It supports 1-4 player(s), takes about 20 min, and is rated easy difficulty.
- Is this game free to play?
- Yes — Decimal Addition is 100% free with no signup required. Just open the page and start playing instantly in your browser on any device.
- What age or grade level is this game for?
- This game is designed for 5th Grade students. The mathematics content is curriculum-aligned for 5th grade level, making it a great supplement to classroom learning.
- Can my child play this game on a tablet or phone?
- Yes. All LittleActivity games work on any device — desktop, tablet, or phone. No app download needed; games run directly in the browser.
- What mathematics skills does this game cover?
- Decimal Addition covers 5th grade mathematics skills through interactive gameplay. It builds problem-solving, critical thinking, and subject fluency in a fun, no-pressure environment.
More 5th Grade Mathematics Games
Subtracting Decimals
Start on a decimal number line and hop back to subtract.
easy20 min
Multiplying Decimals
Build decimal products as area on a hundred grid: tenths wide by tenths tall.
easy20 min
Dividing Decimals
Wire each decimal division to its quotient.
easy20 min
Comparing and Ordering Decimals
Put sets of decimals in order by comparing place by place.
easy20 min
Dividing Fractions
Wire unit-fraction divisions to their answers.
easy20 min
Multiplying Fractions
Build fraction products as area models on fraction grids.
easy20 min