Page 3 - Demo

Square numbersA good visual for square numbers are squares!You get a square number by multiplying a number by itself. So knowing the square numbers is helpful for multiplication. Practice these today:2x2=43x3=94x4=165x5=256x6=367x7=498x8=649x9=8110x10=10011x11=12112x12=144Composite numbersThe word composite means that the numbers are %u201ccomposed%u201d of smaller numbers. For example, the number 10, is composed of 5 and 2. Which means when you multiply them together you get 10. Here are the composite numbers between 1 and 20:468910121415161820Prime numbersThe other numbers are called prime numbers. Which means they can ONLY be multiplied by 1 and itself to make the number. You cannot multiple two different numbers to get it. The prime numbers from 1-20 are:235711131719Now you know that every number is either PRIME or COMPOSITE. The ONLY exception is 1. It is neither prime nor composite. 123456789101112131415161718192021222324251234123456789123456789101112131415161Telling the difference between numbers and digitsA DIGIT is a single numerical symbol, from 0-9.A NUMBER is a string of one or more digitsFor example, 8 is both a digit and a number. However, 22 is a string of two digits so it%u2019s a number%u2014a two digit number. 587 is a three-digit number.