The World of Numbers
Number Skills are very valuable.
Counting
- Counting
- Colorable Number Chart
- Skip Counting
- Number Blocks Freeplay
- Place Value
- Numbers, Numerals and Digits
- Composing Numbers
How to Add, Subtract, Multiply, and Divide
- Basic Operations
Addition
Subtraction
Multiplication and Long Multiplication- Times Tables and Times Tables Test
Division and Long Division- Divisibility Rules
- Long Division with Remainders
- Long Division to Decimal Places
More About Adding, Subtracting, Multiplying, and Dividing
- Math Trainer Multiplication
- Word Questions
- Calculator Fun
- Divide by Repeated Subtraction
- Multiply by Repeated Addition
- How to Add and Subtract Positive and Negative Numbers
- Casey Runner
- Multiplying By Zero
- Multiplying Positive and Negative Numbers
- Order of Operations - GEMS, PEMDAS or BODMAS
- Make The Number Game
- Associative, Commutative and Distributive Laws
- Tens Complement
- What Makes 10?
- Fix The Equation
How to work with Decimals
How to work with Percentages
How to work with Fractions
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The Art of Estimation
Don't need an exact answer? Estimation helps us make a smart guess quickly:
How to Put Numbers in Order
Ratios and Proportions
Algebra, the next step after Numbers
Types of Numbers
Special Numbers
- Cardinal, Ordinal and Nominal Numbers
- Cardinal / Ordinal Chart
- Prime Numbers and Prime Properties
- π (Pi), e (Euler's Number), Phi (The Golden Ratio)
- Geometric Mean
- Factorial Function and Gamma Function
Irrational Numbers
They can't be written as a simple fraction:
Other Number Systems
Binary
1010
Binary FingersHexadecimal
F87A
Other Bases
132
Other Cultures
XVI
Number Theory
Mathematical Curiosities and Tricks
- "Always End With 1089"
- First Digits Rule! (Benford's Law)
- Optimal Stopping: The 37% Rule
- Squares and Odd Numbers
- Game Theory