Common Core Standards
Worried about adding and subtracting fractions? Never fear. It's so easy that it will only take up a fraction of your time: just use multiplication to make the denominators the same. Oh, and make sure to do whatever you did to the denominator to the numerator, too. Our fraction friends deserve equal treatment.
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CAHSEE Math 1.1 Algebra and Functions 
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CAHSEE Math 1.2 Algebra and Functions 
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CAHSEE Math 1.3 Algebra and Functions 
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CAHSEE Math 1.4 Algebra and Functions 
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CAHSEE Math 1.5 Algebra and Functions