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My Math Portfolio By: Ronald Almagro

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**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

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**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

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**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

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**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

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**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

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**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

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**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.

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