Number Chart 1 150. Each chart has unique theme. Use white to erase errors or black to block out numbers.
The idea here is multiple and meaningful exposure.
Before calculators and computers, numerical tables are used for recording all of the primes or prime this method results in a chart called eratosthenes chart as given below. Listen to the pronunciation of the numbers from 1 to 100. Several different formats with hints and rules for reading and translating roman numerals. The chart below shows the list of prime numbers up to 100, which are represented in the coloured boxes.
