HISTORIANS of mathematics attribute the first use of the cross x as a symbol for multiplication to William Oughtred (“Clavis Mathematicae”, London, 1631). See W. W. R. Ball's “Short Account of the ...

Crossdoku multiplication is a great math crossword Sudoku puzzle. Practice logic, math and deductive reasoning skills at the same time. Improve memory, concentration and logical thinking skills. Enjoy ...

Parents need to know that Operation Math: Addition, Subtraction, Multiplication, and Division Speed Drills & Practice Test – Arithmetic Games for Kids helps kids build fluency in any of the four main ...