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Arithmetic
Introduction to Mathematics
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ARITHMETIC
The four basic arithmetical operations
Lesson
Order of operations
Rounding and estimates
MULTIPLICATION
Multiplication with negative numbers
Multiplication with decimal numbers
Multiplication with fractions
DIVISION
Multiplication and division by 10
Divisibility
Division with fractions
Division with negative numbers
Division with decimal numbers
NEGATIVE NUMBERS
Introduction to negative numbers
Addition and subtraction with negative numbers
NUMBER SYSTEMS
The positional system with base 10
Rational numbers
MEASUREMENTS AND UNITS
SI units
Prefixes
Common measurement units and conversions
Weight, mass, and volume
Measurements: Density
Time: Calculations around the clock
CALCULATIONS AND METHODS
FRACTIONS
Fractions and decimals
Expanding and reducing fractions: Introduction
Expanding and simplifying fractions: More examples
Comparing fractions with different denominators
The lowest common denominator
PRIME NUMBERS AND FACTORISATION
Prime numbers: Rectangular numbers
Prime numbers: Factorisation
EXPONENTS AND ROOTS
Introduction to exponents
Powers of ten
Scientific notation
Square roots
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