Menu » Arithmetic

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• Numbers
• Roman, binary, octal and Babylonian numerals
• Rounding off and significant digits
• Divisor, divisbile and multiple
• Even and odd
• Basic rules / Calculation order
• What is stream-of-consciousness notation (knitting)?
• Ratios
• Fractions
• Percentages
• Negative numbers & greater than (>) and less than (<)
• Sum, difference, product and quotient
• What are powers?
• Long division
• Rules of thumb (to use with estimations)
• Converting units
• Units of time
• Scientific notation (Standard form)
• (Square) Roots
• Simplifying square roots
• Prime numbers
• Number systems (sets)
• Imperial and US units
• Computer memory
• Astronomical measurements