Rules of Divisibility Video Help
(Look at the "Divisibility Hints" Image at the top of this page for all the rules for divisibility!
(Look at the "Divisibility Hints" Image at the top of this page for all the rules for divisibility!
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LEAST COMMON MULTIPLE: LCM AND GREATEST COMMON FACTOR: GCF
Key Points:
- MULTIPLES- you get MULTIPLES when you MULTIPLY (Multiples are MANY) Multiples of 2 are 2, 4, 6, 8, 10...
- FACTORS- FACTORS are in the FACTS (Factors are FEW) Factors of 12 are 1, 12, 2, 6, 3, 4
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Dividing Fractions AND Division with Measurement
Key Points:
Key Points:
- In MEASUREMENT Division, the divisor names the size of the group (or unit) and the quotient represents the number of groups (or units).
- A Measurement Division problem can often be solved by thinking "How Many _________ are in ____________? "
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Multiplying Decimals
- When MULTIPLYING Decimals, order does not matter when listing them! Be sure to count the number of digits to the right of ALL the decimals and before placing your decimal into your answer.
- LOOK at your answer, does it make sense?
NumberRock Video: Mutiplying Decimals
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The Distributive Property
- The Distributive Property is easy to remember, if you recall that "multiplication distributes over addition". Formally, they write this property as "a(b + c) = ab + ac". In numbers, this means, for example, that 2(3 + 4) = 2×3 + 2×4.
Converting Decimals to Fractions
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Long Division
- The division is a method of distributing a group of things into equal parts.
- The division is the opposite of multiplication.
- If 3 groups of 4 make 12 in multiplication; 12 divided into 3 equal groups give 4 in each group in division.
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Dividing Decimals
Hint: How can you get rid of the decimal? Can you get rid of the decimal in some way?
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