# Math

## Order of Operations

Order of Operations is when you have a long equation with more than one operation. The sentence you can use to help you remember the order of operations is: Please excuse my dear aunt Sally. Multiplication, Division, Addition and Subtraction

If I have \$10,000,000 I get 12 times that and I want to share it out with my four friends. Then I get \$245,678, but then I get sued and lose \$250,000. How Much do I have now?

(10,000,000 x 12) divided by 4 + \$245,678 - \$250,000 = \$ 29,995,678

## Fibonacci Sequence

The Fibonacci Sequence is a series of numbers where you add up the first two numbers then you get the next number and you do the same until you get to googolplex. 0,1,1,2,3,5,8,13,21,34,55,89,144,233,377,610,987,1,597,2,584 and so on.

If you continue to count with the Fibonacci Sequence what will be the 22nd number?

0,1,1,2,3,5,8,13,21,34,55,89,144,233,377,610,987,1,597,2,584,4,181,6,765,10,946

10,946 is the 22nd number of the Fibonacci Sequence.

What is the 23rd number of the Fibonacci Sequence?

0,1,1,2,3,5,8,13,21,34,55,89,144,233,377,610,987,1,597,2,584,4,181,6,765,10,946,17,711

17,711 is the 23rd number of the Fibonacci Sequence.

What is the 24th number in the Fibonacci Sequence?

0,1,1,2,3,5,8,13,21,34,55,89,144,233,377,610,987,1,597,2,584,4,181,6,765,10,946,17,711,28,657

28,657 is the 24th number in the Fibonacci Sequence.

What is the 25th number in the Fibonacci Sequence?

0,1,1,2,3,5,8,13,21,34,55,89,144,233,377,610,987,1,597,2,584,4,181,6,765,10,946,17,711,28,657,46,368

46,368 is the 25th number in the Fibonacci Sequence.

## Abacus

Before there were calculators People in China invented the abacus. You use it by sliding beads across it to add, subtract, multiply or divide. Usually people with abacuses beat people doing it on paper!
Division on Abacus

## Googol

Googol is the second highest named number. It is a 1 followed by 100 zeros.

10,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000

## Googolplex

Googolplex is the highest named number. It is a one followed by googol zeros.

A short way to write it is 10googol.