Objective - To add and subtract fractions using the least common denominator. Like termsUnlike terms 2 pens3 pens + 5 pens = 2 pens3 rulers + 4 roses8.

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Presentation transcript:

Objective - To add and subtract fractions using the least common denominator. Like termsUnlike terms 2 pens3 pens + 5 pens = 2 pens3 rulers + 4 roses8 roses + 12 roses = 5 roses7 daises + 5x2x + 7x = 6x7y + Only like things can be combined ! One-halfTwo-fifths + + = = ?

+ = + = = or Unlike things can’t be combined. Therefore, change the fractions so that they have a common denominator. Only like things can be combined !

Write a numerical expression that describes the model, then evaluate the expression =

Write a numerical expression that describes the model, then evaluate the expression. + + = +

Find the lowest common denominator for the given fractions.

Add or subtract. + ==

+ =

+ +

Find the perimeter of the figure below. +

Evaluate the expression below if + =