Math adds up

Math is a language we all understand

Stone Age people were great at math

Fractions can be beautiful

The Romans used letters for numbers

Arabic numbers are used everywhere

Sometimes "111" means "7"

One third of all numbers begin with "1"

You can use pi to measure a pie

A starfish has five lines of symmetry

Light-years measure length, not time

Niagara Falls fills 7,500 tubs a second

A butterfly's wings can cause hrricanes

Some seeds grow in a math pattern

Prime numbers help animals to survive

Thermometers use different zeroes

A cent can "double" to millions in weeks

Two people in a class share a birthday

You can win and lose in tennis

Sharks can smell one in a million

Two hundred tons of metal can float

Even experts expect errors

Glossary.