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1,2,3,4,5,6…..... Fun and Games What am I Learning Today? Prime and Composite Numbers.

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Presentation on theme: "1,2,3,4,5,6…..... Fun and Games What am I Learning Today? Prime and Composite Numbers."— Presentation transcript:

1 1,2,3,4,5,6…....

2 Fun and Games

3 What am I Learning Today? Prime and Composite Numbers

4 Vocabulary Composite number: A number that is divisible by more than two numbers. Prime number: A number greater than one that is only divisible by one and itself.

5 Step 1: Circle 2 in blue because it is prime. Now cross out all the multiples of 2 with that same color. Step 2: Circle 3 in green because it is prime. Now cross out every third number with that same color. Step 3: Circle 5 in red because it is prime. Now cross out all the numbers that end in 0 or 5 in that same color. Step 4: Circle 7 in yellow because it is prime. Now cross out every seventh number with that same color. Step 5: Circle the remaining numbers, EXCEPT for one, in purple Square because they are all prime. 2345678910 11121314151617181920 21222324252627282930 31323334353637383940 41424344454647484950 51525354555657585960 61626364656667686970 71727374757677787980 81828384858687888990 919293949596979899100 101102103104105106107108109110 111112113114115116117118119120


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