chapter 4 notes 7 th grade math adding and subtracting fractions10/30 2. find a common denominator...
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Adding and Subtracting Fractions 10/30
2. Find a common denominator
3. Add or subtract the numerators
Steps
4. Keep the common denominator
5. Write in simplest form (change all improper fractions back into mixed numbers)
1. Convert all mixed numbers into improper fractions
ConvertingA MixedNumberTo anImproper
MAD face
1. Multiply the denominator by the whole number then add the product to the numerator
2. That is the new numerator—keep the old denominator
Multiply, Add, keep the Denominator
1. Divide the numerator by the denominator
ConvertingAnImproperTo aMixed #
2. The quotient is the whole number
3. The remainder is the new numerator
4. Keep the same denominator
Example1. Convert all mixed numbers into improper fractions
2. Find a common denominator
3. Add or subtract the numerators4. Keep the common denominator
5. Write in simplest form
Multiplying Fractions 11/3
2. Simplify by taking common factors out of the numerators and denominators 3. Multiply numerators together
Steps to multiply fractions
4. Multiply denominators together
5. Write in simplest form (change all improper fractions back into mixed numbers)
1. Convert all mixed numbers into improper fractions
Example2. Simplify by taking common factors out of the numerators and denominators
÷ 5
÷ 53. Multiply numerators together4. Multiply denominators together
5. In simplest form
1. Convert all mixed numbers into improper fractions
2. Keep 1st fraction
Steps to divide fractions
3. Change Division to multiplication
4. Flip Write the reciprocal of the 2nd fraction
5. Follow steps to multiply fractions
Dividing Fractions 11/3
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