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10 Have a 1 minute conversation with the person you’re sitting next to. State EVERYTHING you know about this number. 10 5 • WHAT DO THESE NUMBERS HAVE IN COMMON? • HOW ARE THESE NUMBERS DIFFERENT? 25 Do you think 25 is more closely related to 10 or 5….explain your thinking? When looking at a one hundred chart such as this, we see different types of numbers. • Odd and Even numbers • Hopefully these should be pretty obvious at this point. There are other types of numbers that it is important to identify, as understanding these types of numbers helps us understand factors, multiples, and rules of divisibility. • PRIME NUMBERS • COMPOSITE NUMBERS • SQUARE NUMBERS COPY DOWN THE FOLLOWING THINKING MAP IN YOUR NOTEBOOK. PRIME • A number with only 2 factors (1 and itself) ____ x ____ = 5 1x5=5 1 and 5 are the only two whole numbers that multiply to form a product of 5. 1 and 5 are factors of 5. COMPOSITE • A number with more than 2 factors. ____ x ____ = 10 1 x 10 = 10 2 x 5 = 10 10 has 4 different numbers as factors; 1, 2, 5, 10 SQUARE • The product of a whole number with itself. 5 x 5 = 25 6 x 6 = 36 When you multiply a number to itself, it forms a square number. Can you think of any others? DIVISIBILITY A number is divisible by another number if the quotient is a whole number with no remainder. 24 ÷ 6 = 4 QUOTIENT: The answer to a division problem. 24 is divisible by 6. 14 ÷ 5= 2 r 4 14 is not divisible by 5. IN YOUR NOTEBOOK, WRITE DOWN THE FOLLOWING NUMBERS: 12 COMPOSITE. DIVISIBLE BY 2 AND 3 BUT NOT 5. 21 COMPOSITE. DIVISBLE BY 3 BUT NOT 2 OR 5. 37 PRIME. NOT DIVISIBLE BY 2, 3, OR 5 64 COMPOSITE. DIVISIBLE BY 2 BUT NOT 3 OR 5. WITH A PARTNER, DISCUSS IF THESE NUMBERS ARE PRIME, COMPOSITE, OR SQUARE. ARE ANY OF THESE NUMBERS DIVISIBLE BY 2? DIVISIBLE BY 3? DIVISIBLE BY 5?