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Topic: Number
Sub-topics: Absolute Value (2) Consumer Arithmetic (13) Decimals (22) Directed Numbers (11) Divisibility (2) Estimation (1) Factors (2) Fractions (32) History of Number (4) Index Notation (2) Money (8) Multiples (1) Number Line (4) Operations (39) Order of Operations (13) Ordering (3) Percentages (12) Place Value (23) Probability (15) Ratio and Rates (9) Real Numbers (1) Rounding (6) Scientific Notation (12) Special Numbers (17) Surds (3) Times Tables (6)
Waldomaths Probability 3-Tree Diagram
Extended version of the Waldomaths tree-diagram – now available with 3 choices
Waldomaths Probability Tree Diagram
Two stage probability tree to show possibilities when removing two balls from a mixed bag of two colours. Options to calculate for replacement or no replacements. Not immediately obvious how to use, but good options to hide and reveal calculations.
When not knowing Math can cost you $15,000
Contestant on Who Wants To Be A Millionaire attempts to answer: “Which of these square numbers also happens to be the sum of two smaller square numbers?”
Wishball
iPad application. Link to iTunes launch page.
Challenge your understanding of place value in whole numbers and decimal fractions, from 0.001 to 9999. Either add or subtract numbers to reach a target number.
