Introductory Numbers

Natural Numbers - the counting numbers. Examples: 1, 2, 3, 4

Whole Numbers - the natural numbers and zero. Examples: 0, 1, 2, 3, 4

Integers - negative natural numbers, zero, and the positive natural numbers. Examples: –4, –3, –2, –1, 0, 1, 2, 3, 4

Prime Number - a natural number whose only factors are itself and 1. The number 3 is a prime number because its only factors are itself and 1 (3 × 1 = 3). Prime numbers do not include 1. Examples: 2, 3, 5, 7, 11, 13, 17, 19

Composite Number - a natural number that is not prime. Examples: 4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20

Common Fraction - part of a whole written with a numerator (the number above the vinculum line) and a denominator (the number below the vinculum line). Examples: 12, 110, 23

Decimal Fraction - parts of a whole expressed where the parts are expressed in tenth parts. Examples: 0.5, 0.79, 0.857

Terminating Decimal Fraction - a decimal fraction which has a definite ending. Examples: 0.5, 0.75, 0.467

Recurring Decimal Fraction - a decimal fraction where one digit or a group of digits repeats. A line over the digits indicates what digits repeat. Examples: 19 = 0.111111..., 13 = 0.33333..., 211 = 0.18181818...

Index (Plural is indices) - an exponent, a power. Used when a number is multiplied by itself. Examples: 100 = 10 squared = 10 to the index of 2 = 102


NAMEAMOUNTNUMERALS
Milliona thousand thousand1 000 000
Billiona thousand million1 000 000 000
Trilliona thousand billion1 000 000 000 000
Quadrilliona thousand trillion1 000 000 000 000 000
Pentilliona thousand quadrillion1 000 000 000 000 000 000

Calculator Word Fun

Work these out on a calculator and then turn the calculator upside down.

1777 × 4
1667 × 21
877300 – 341792
8922 + 20132 + 6285
(300 + 163) × 8
(9080 + 543) × 6

Do you have friends with great calculator names like BOB and ELOISE?
Make up questions that create their names when the calculator is turned upside down.