# My Math Portfolio By: Ronald Almagro.

## Presentation on theme: "My Math Portfolio By: Ronald Almagro."— Presentation transcript:

My Math Portfolio By: Ronald Almagro

First I’m going to tell you, what are fractions
First I’m going to tell you, what are fractions? A fraction is a number that can represent part of a whole. Example: 3 8

1 5 Next I’m going to show you what are nominators and denominators
Numerators are the numbers on top 1 5 Denominators are the numbers below

Now I’m going to tell you how to add fractions.
You might think this is how you add fractions. 7 18 4 9 3 9 But it is actually like this 7 9 3 9 4 9 You don’t add the denominator

Now I’m going to tell you how to subtract fractions.
You might think this is how you subtract fractions. 1 3 9 4 9 But it is actually like this 1 9 3 9 4 9 Like adding, you don’t do anything to the denominator

3 4 I’m going to tell you what are prime numbers.
Prime Numbers is a whole number greater than 1 that has exactly two factors, 1 and itself. You may wondering “then what are the other numbers” well the other numbers are called composite numbers. Composite numbers are whole numbers greater than 1 that has more than two factors. composite Example: prime 3 4

How do you find prime and composite numbers?
Step:3 Keep doing it to the ones that are not crossed Here is one way you can find prime and composite numbers. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 Step:1 Cross out number 1 since is not a prime number Step4: The ones that are circled they are prime and the ones crossed they are composite Step:2 Circle 2 and then cross out all of its multiples 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100

Here is another way you can find if a number is prime or composite
x 9 1 9 x 3 3 You have to see how many tables could you do with the number If you find 2 or more ways to multiply it, it is a composite number and if you only find one is a prime.