Category: 1. Numbers & Operations

Addition (+): Adding two or more numbers to get a sum.Subtraction (-): Finding the difference between two numbers.Multiplication (×): Repeated addition of a number.Division (÷): Dividing a number into equal parts or finding how many times one number fits into another. Features of operationsExchange property:Increase:a + b = b + amultiplication:a × b = b…

There are a finite number of numbers that we use in both mathematics and real-world situations. Several numbers can be used interchangeably (real numbers), while some have stringent rules and regulations (complex numbers). It is important to be sure that each real number is correctly used. To properly use real numbers, a system identifies the…

The terms factor and multiple are sometimes confused with each other. Factors of 15 include 3 and 5; multiples of 15 include 30, 45, 60 (and more). See more below and at multiple. Meaning Factor can be used as a verb or a noun. So, for example, 3 is a factor of 12 because 3…

Building Numbers from Small Building Blocks: Any counting number, except 1, can be made by adding two or more small counting numbers. But only a few counting numbers can be formed by multiplying two or more smaller counting numbers. Prime and composite numbers: We can make 36 by multiplying 9 and 4. Or we can…