Opposite of Multiplication

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Presentation transcript:

Opposite of Multiplication Fraction Division Opposite of Multiplication

The second fraction: Invert or Flip Called the reciprocal Definition: when the product of two numbers is one, also when you flip the second fraction in a fraction division problem Ex:

To Divide Flip the second number Multiply

Steps Change Whole numbers and mixed numbers to improper fractions Flip the second fraction (the divisor) and multiply Multiply numerator by numerator and denominator by denominator.

Examples

Word Problems

Commutative Multiplication is commutative 3x4 = 4x3 Is division commutative? NO! Definition: numbers can be multiplied or added in any order

Division The order matters When working word problems, be careful what order you write the problem. The thing being split, cut, sorted, shared, divided, or grouped goes first. How many pieces or how big goes second.

Fran puts 5 1/3 lbs of chocolate in 2/3 lb containers Fran puts 5 1/3 lbs of chocolate in 2/3 lb containers. How many containers? Chocolate is first as it is being split. 8 containers.

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