Math You'll Actually Use
Like Duolingo, but for Math You'll Actually Use. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
For the part of you with thirty open tabs that never became anything.
Free during early access · No credit card · iPhone & Android

Key ideas in Math You'll Actually Use
- Calculating unit price to compare two different sized products
- Evaluating if a BOGO deal is superior to a bulk item
- Larger quantities usually, but not always, offer a lower price per ounce
- Comparing values requires finding a common denominator (price per 1 unit)
- Ranking items by value based on unit price calculation
- Rounding to the nearest .50 or 1.00 creates 'friendly numbers' for mental addition
- Rounding up slightly provides a safety buffer for your budget
- Identifying which whole or half-dollar a price is closest to
- Simplifying complex decimals into manageable increments
- Tax is a percentage added to the subtotal
- Rounding strategies for mental addition
- Using a 1:10 ratio (10%) as a mental shortcut
- Matching prices to friendly numbers
- BOGO vs Bulk
- 10% represents one-tenth of the total value
- Finding 10% is equivalent to moving the decimal point one place to the left
You've tried the other tabs
Thirty open tabs. Four facts you actually kept.
You watched. You nodded. By Sunday it was gone.
One answer, then back to scrolling.
Eight weeks. You meant to finish. You didn't.
Tomo gives Math You'll Actually Use the Duolingo treatment: levels, streaks, and quick quizzes that test what you just learned. That game loop is what the tabs above never had, so it's the one you actually finish.
Here's what playing it feels like
A real question from this course. Take your best guess.
If you have a big bag of candy, how do you find out the price for just one piece?
Get it right to open this lesson and 25 more in the app.
Where Math You'll Actually Use takes you
Stop wondering when you'll ever use math in real life. Master the mental shortcuts for shopping, cooking, and planning that make everyday decisions effortless.
- 1
Win at the Grocery Store
- Spotting the better deal
- Estimating your total at the checkout
- The secret to calculating percentages off
- Understanding weight and volume on labels
- 2
Master Your Home and Kitchen
- Scaling a recipe for more people
- Measuring a room for new furniture
- How much paint do you really need?
- Reading a thermometer and a clock
- Dividing a bill without the drama
- Tipping like a pro
- 3
The Logic Behind the Numbers
- Why we use a base-ten system
- How averages can be misleading
- The power of compound interest
3 sections · 13 units · 26 levels. Built to play, not to enroll.
You pick the voice
Math You'll Actually Use is taught in the Explain Like I'm 5 style: no big words. promise.. Want a different feel? In the app you can spin up the same topic in any of Tomo's teaching styles. Same facts, totally different vibe.
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Start Math You'll Actually Use today.
Download Tomo, search Math You'll Actually Use, and play your first lesson in under a minute.