Survey

* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project

Survey

Document related concepts

Transcript

BASIC CALCULATION SKILLS What students need to know: Students should be confident with the items in the chapter’s ‘Before you start...’ section. Specifically they should: • know the meanings of the words sum, quotient, product and difference; SUM: the aggregate of two or more numbers, magnitudes, quantities, or particulars as determined by or as if by the mathematical process of addition: The sum of 6 and 8 is 14. A particular aggregate or total, especially with reference to money: The expenses came to an enormous sum. Quotient:a result obtained by dividing one quantity by another Product: A product in math is defined as the answer of an equation in which two or more variables are multiplied. In other terms, a product is the answer to any multiplication problem. The product of 4 and 5 is 20. Difference:A difference is the result of a subtraction problem. The difference of 10 and 7 is 3. • be able to use formal and informal methods and algorithms, both mental and written, for the four operations of arithmetic; An Algorithm is a step-by-step solution. It is like a cooking recipe for mathematics. Example: one algorithm for adding two digit numbers is "add the units, add the tens and combine the answers" Long Division is another example of an algorithm: when you follow the steps you get the answer. • understand the distributive law; The Distributive Law says that multiplying a number by a group of numbers added together is the same as doing each multiplication separately. a(b + c) = ab + ac • know that multiplication and addition are commutative The "Commutative Laws" say we can swap numbers over and still get the same answer … ... when we add:a +b = b+a Or when we multiply a×b = b×a