
Positive integers Negative integers
... Adding and subtracting integers summary To add a positive integer we move forwards up the number line. To add a negative integer we move backwards down the number line. a + –b is the same as a – b. To subtract a positive integer we move backwards down the number line. To subtract a negative integer ...
... Adding and subtracting integers summary To add a positive integer we move forwards up the number line. To add a negative integer we move backwards down the number line. a + –b is the same as a – b. To subtract a positive integer we move backwards down the number line. To subtract a negative integer ...
Chapter 10 - Haese Mathematics
... However, there are many situations where it does make sense to talk about numbers less than zero. For example, suppose the temperature at Cradle Mountain, Tasmania, is 5± C at 8 pm. Between 8 pm and midnight, the temperature falls by 7± C. The temperature at midnight is given by 5 ¡ 7. The answer is ...
... However, there are many situations where it does make sense to talk about numbers less than zero. For example, suppose the temperature at Cradle Mountain, Tasmania, is 5± C at 8 pm. Between 8 pm and midnight, the temperature falls by 7± C. The temperature at midnight is given by 5 ¡ 7. The answer is ...
A Unit 5 - Formulae
... 1) Give examples of equations, formulae, identities and expressions. Ask students to distinguish between them. E.g. Formulae: E = mc2, V = IR Expressions: 2y, 4x – 3, 3a2 Identities: x2 x x x, 9y2 + 3y 3y(3y + 1) Equations: 3y – 1 = 4, 9x2 + 2 = 38 2) Think of a number: E.g. a) My number plus 6 ...
... 1) Give examples of equations, formulae, identities and expressions. Ask students to distinguish between them. E.g. Formulae: E = mc2, V = IR Expressions: 2y, 4x – 3, 3a2 Identities: x2 x x x, 9y2 + 3y 3y(3y + 1) Equations: 3y – 1 = 4, 9x2 + 2 = 38 2) Think of a number: E.g. a) My number plus 6 ...
Scientific Notation
... Chemists use scientific notation to write very small and very large -numbers. Scientific notation allows a very large or very small number to be written as a number between 1 and 10 multiplied by a power of 10. By expressing numbers in this way, scientific notation makes calculating easier. The most ...
... Chemists use scientific notation to write very small and very large -numbers. Scientific notation allows a very large or very small number to be written as a number between 1 and 10 multiplied by a power of 10. By expressing numbers in this way, scientific notation makes calculating easier. The most ...
Focus on Mathematics - St. Leonards RC Primary School
... Focus on Mathematics Year 5 Pre-Learning Tasks Number •Pre-learning tasks are used at the start of each new topic in Maths. •The children are grouped after the pre-learning task is marked to ensure the work is pitched correctly. •St Leonard’s use the pre-learning tasks devised by Focus Education for ...
... Focus on Mathematics Year 5 Pre-Learning Tasks Number •Pre-learning tasks are used at the start of each new topic in Maths. •The children are grouped after the pre-learning task is marked to ensure the work is pitched correctly. •St Leonard’s use the pre-learning tasks devised by Focus Education for ...
Addition
Addition (often signified by the plus symbol ""+"") is one of the four elementary, mathematical operations of arithmetic, with the others being subtraction, multiplication and division.The addition of two whole numbers is the total amount of those quantities combined. For example, in the picture on the right, there is a combination of three apples and two apples together; making a total of 5 apples. This observation is equivalent to the mathematical expression ""3 + 2 = 5"" i.e., ""3 add 2 is equal to 5"".Besides counting fruits, addition can also represent combining other physical objects. Using systematic generalizations, addition can also be defined on more abstract quantities, such as integers, rational numbers, real numbers and complex numbers and other abstract objects such as vectors and matrices.In arithmetic, rules for addition involving fractions and negative numbers have been devised amongst others. In algebra, addition is studied more abstractly.Addition has several important properties. It is commutative, meaning that order does not matter, and it is associative, meaning that when one adds more than two numbers, the order in which addition is performed does not matter (see Summation). Repeated addition of 1 is the same as counting; addition of 0 does not change a number. Addition also obeys predictable rules concerning related operations such as subtraction and multiplication.Performing addition is one of the simplest numerical tasks. Addition of very small numbers is accessible to toddlers; the most basic task, 1 + 1, can be performed by infants as young as five months and even some non-human animals. In primary education, students are taught to add numbers in the decimal system, starting with single digits and progressively tackling more difficult problems. Mechanical aids range from the ancient abacus to the modern computer, where research on the most efficient implementations of addition continues to this day.