Europe
Written partial products
STEP 1 / 4
Split the multiplier into tens and ones.
14 = 10 + 4114 = 10 + 4
A widely used place-value algorithm; not exclusive to Europe.
Try this tool yourself →MATH AROUND THE WORLD
Same answer.
Different road.
Move beads. Build numbers. Try a new way to think.
World Math Explorer 0%
SEE THE SAME CALCULATION TRAVEL
One example. Different models.
A worked example, not a test. Follow the numbers along each road.
Ancient Egypt
Doubling and choosing rows
STEP 1 / 6
Start with one copy.
1 → 23CopiesValue
✓ 123
246
492
8184
Historical doubling, displayed with modern numerals.
Try this tool yourself →Regional stops provide historical context, not exclusive ownership of a method. The paths have different numbers of steps; a finished path stays visible while the other continues.
4 methods
Europe
Algorithms, geometry & calculation
Mastery 0%
Explore Europe →Choose a method
Shared ideas, travelling tools. Decimal arithmetic reached Europe through the Arabic-speaking world; these algorithms belong to no single culture.
5 methods
India
Numbers, place value & mental calculation
Mastery 0%
Explore India →Choose a method
Explore place value and zero, then separate their long history from modern collections of mental shortcuts.
5 methods
China
Counting rods, equations & problem solving
Mastery 0%
Explore China →Choose a method
Decimal rods and problem-solving procedures from a rich written tradition, including the Nine Chapters and its commentaries.
7 methods
Japan
Abacus, mental arithmetic & geometry
Mastery 0%
Explore Japan →Choose a method
From a hands-on soroban to mentally visualized beads and geometry inspired by sangaku tablets.
5 methods
Islamic Golden Age
Algebra, algorithms & mathematical discovery
Mastery 0%
Explore Islamic Golden Age →Choose a method
A connected, multilingual world of scholars across many regions—not one homogeneous culture. Explore al-Khwarizmi’s work in Abbasid Baghdad.
5 methods
Ancient mathematics
Calculation before calculators
Mastery 0%
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Distinct Egyptian, Mesopotamian and Roman practices, shown with clearly labelled modern teaching notation.
Achievements · 0 / 7
World Explorer
Practise in three traditions
Keep exploringAbacus Apprentice
Finish the first soroban challenge
Keep exploringMental Math
Solve five mental-calculation problems
Keep exploringAncient Calculator
Earn three stars in Egyptian multiplication
Keep exploringGeometry Traveller
Solve a sangaku-inspired puzzle
Keep exploringZero Hero
Finish the zero challenge
Keep exploringMethod Master
Solve one problem with three techniques
Keep exploringMathematics is shared. These stops explore historical traditions, tools and modern teaching approaches—not how every person in a country learns. Progress stays on this browser, separate from your existing Math game. No account needed.