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Divisibility by 4 and 8

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**The divisibility rules for 4 and 8 are as follows:**

4- a number is divisible by 4 if the last two digits are divisible by 4 8- a number is divisible by 8 if the last three digits are divisible by 8 Ex. Determine whether the number is divisible by 4 and 8. Solution: The last 2 digits are 52 52/4=13 The last 3 digits are 452 452/8 56.5 The number is divisible by 4 but not 8

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Example #1 Determine whether the number is divisible by 4 or 8 Solution: The last 2 digits are 56 56/4= 14 The last 3 digits are 256/8= 32 Therefore, 4 and 8 are factors

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Your turn Explain whether 72 is divisible by 4 72/4=18 Yes

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Practice Page 18 #1 Stop and Check Continue onto #3, 4, 5, 8, 9

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Divisibility Rules and Mental Math

Divisibility Rules and Mental Math

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