Pre-Algebra Bell Ringer 1. 10x – 5y = 2 Solve for y 2. m – n – 12 = p Solve for n 3. a – 4 < 3a + 18 4. 3x + 8 ≥ -22 – 7x.

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Presentation transcript:

Pre-Algebra Bell Ringer 1. 10x – 5y = 2 Solve for y 2. m – n – 12 = p Solve for n 3. a – 4 < 3a x + 8 ≥ -22 – 7x

Math 7 Bell Ringer 1. Write as an improper fraction 2. Write as a decimal 3. Write.345 as a fraction 4. Order from least to greatest: 0.82,,

ADDING AND SUBTRACTING FRACTIONS

Adding and Subtracting Fractions  What are the parts of the fraction?  Top number = numerator   Bottom number = denominator  Also, remember your integer rules!!!

Adding and Subtracting Fractions  When denominators are the SAME  We will add the numerators and keep the common denominator.  Write your answer in simplest form!

Adding and Subtracting Fractions  When denominators are DIFFERENT  Find a “common denominator” in two ways: 1. Find the LCM of the denominators 2. Multiply the denominators Note: Whatever you do to the denominator, you MUST do to the numerator!

Adding and Subtracting Fractions