abacuses
Ancient counting frames
Abacuses is the plural of abacus, a counting frame with beads or disks that slide along rods or wires.
Used for arithmetic before electronic calculators, abacuses remain teaching tools and are still preferred by some for rapid calculation: The classroom had several abacuses for the children to practice addition.
Small pierced ornaments for stringing
- frameSupporting outer structure
- rowsSide-by-side sequences
- rodsThin cylindrical shafts
- countersSurfaces, talliers, or chips
wooden · bamboo · sliding · manipulatives · strung · columns · wires · deck
Determining quantity sequentially
- additionJoining quantities mathematically
- subtractionRemoving quantities mathematically
- multiplicationProduct-finding operation
- divisionSplitting into parts
arithmetic · tally · computation · reckoning · place value · carrying · borrowing · mental math
Very old indeed
- MesopotamiaTigris-Euphrates river region
- BabylonAncient Mesopotamian capital
- ChinaEast Asian superpower
- RomeItaly's capital city
Greece · merchants · traders · scholars · antiquity · invention · commerce · bookkeeping
Profession of instructing others
- learningGaining knowledge gradually
- MontessoriChild-led educational philosophy
- primary schoolEarly childhood education institution
- numeracyAbility with figures
students · tutoring · demonstration · curriculum · pedagogy · early childhood · homeschool · kinesthetic
beads
Small pierced ornaments for stringing
counters · wooden · bamboo · sliding · manipulatives · strung · columns · wires · deck · base
counting
Determining quantity sequentially
- additionJoining quantities mathematically
- subtractionRemoving quantities mathematically
- multiplicationProduct-finding operation
division · arithmetic · tally · computation · reckoning · place value · carrying · borrowing · mental math · speed
ancient
Very old indeed
- MesopotamiaTigris-Euphrates river region
- BabylonAncient Mesopotamian capital
- ChinaEast Asian superpower
Rome · Greece · merchants · traders · scholars · antiquity · invention · commerce · bookkeeping · traditional
teaching
Profession of instructing others
- learningGaining knowledge gradually
- MontessoriChild-led educational philosophy
- primary schoolEarly childhood education institution
numeracy · students · tutoring · demonstration · curriculum · pedagogy · early childhood · homeschool · kinesthetic
Roman
Of ancient Italy's capital
- schoolingelementary school, school, middle school, high school, primary schools
abacusescomputers
Programmable electronic devices
supercomputers · smartphones · laptops · quantum computers · tablets
abacusessupercomputers
Extremely powerful computing machines
cutting-edge technology · high technology · quantum computing · digital systems · automation