What are logarithms? Numbers and math
Earthquake in Peru - we measure earthquakes using logarithms What are logarithms? Logarithms are a way of writing numbers using exponents. "Log 100" means the exponent you'd need to use to get 100 [...]
Earthquake in Peru - we measure earthquakes using logarithms What are logarithms? Logarithms are a way of writing numbers using exponents. "Log 100" means the exponent you'd need to use to get 100 [...]
Infinity: A number line is infinite in both directions. No end to the number line When we think about the number line, we can see that there's no end to it [...]
A fraction of a pie: What are fractions? We started with whole numbers When we first thought about the number line, we counted only in whole numbers - we went straight from zero [...]
What are factors? Factors of a number: Three is a factor of nine. What are factors of a number? A factor is a whole number that fits evenly into another whole number. [...]
This is a square. The darker purple line is the perimeter of the square. Using exponents is a short way of saying "multiply the number by itself." The little number [...]
A pie cut into thirds The denominator of a fraction is the number on the bottom (the top is the numerator). In the fraction 1/2, the denominator is 2. In the fraction 45/66, the denominator [...]
A number line is infinite in both directions. Decimals, like fractions, are a way of describing points on the number line that fall in between the whole numbers. If you were using fractions, you'd [...]
A fraction of a pie If you want to add two fractions together, both fractions must have the same denominator. That's okay if you want to add 1/9 and 4/9 = 5/9. But what if [...]
An infinite distance: stars in the sky Why do we use exponents? Some numbers are so big that it's hard to write them in the regular way. The number line [...]
Calculating the area of your room. The area of a room is the size of the floor. Suppose you wanted to find out whether your room was really bigger than [...]