Cell TheoryUntil microscopes became powerful enough to view individual cells, no-one knew for certain what living organisms were made fromA scientist called Robert Hooke came up with the term "cells" in the 1660's after examining the structure of corkMatthias Schleiden and Theodor Schwann were two s...
Algebraic NotationWhat is algebraic notation?When writing expressions in algebra (as opposed to sums in numbers) there are conventions and symbols that are used that take on a particular meaningThis is what we mean by algebraic notationIn number work, for adding and subtracting, we use + and –In alg...
Place ValueWhat is place value?When a number is written down using digits, each digit has a value depending on where it is within the numberFor example for the number 9876The 6 represents 6 ones (or units)The 7 represents 7 tensThe 8 represents 8 hundredsThe 9 represents 9 thousandsIn words, this nu...
