Number plane project – Battleship
A game of Battleship A fun way to practice plotting points on the number plane is to play Battleship. You will need two pieces of graph paper, two pencils, and two kids. Each kid [...]
27
07, 2017
27
07, 2017
Medieval Islamic mathematics
Indian numbers and medieval Islamic mathematics Indian numbers About 630 AD, just before the Islamic empire got started, people in West Asia learned from traders or traveling scholars about "Arabic" numbers. Indian mathematics The invention [...]
18
07, 2017
How did ancient Greek people write numbers?
How the alphabet evolved People in ancient Greece had a variety of different ways of writing down numbers, but none of them was very efficient. (And of course different Greek city-states used somewhat [...]
18
07, 2017
Greek mathematics – Geometry and Proofs
Greek mathematics: An Egyptian papyrus from about 100 AD which is a piece of one of Euclid's books Greek math: geometry not algebra Because people in ancient Greece had only very clumsy [...]
19
06, 2017
Numbers in ancient Egypt
How to write 103,367 in Egyptian numbers How to write Egyptian numbers By about 3000 BC, the ancient Egyptians had ways to write down numbers. They made one vertical line [...]
12
06, 2017
What’s a percentage?
A sheep in a pasture A percentage is a certain number of hundredths of something. For instance, if you have a hundred sheep, and you give five of them to [...]
19
05, 2017
African Math – Fractions and algebra
African math: Lebombo tally stick (35,000 BC) The first tally sticks African people were the first people anywhere in the world to use counting to keep track of their things, [...]
