Correct: 1/4 + 1/4, 2/8 + 2/8, 1/6 + 2/6, 4/10 + 1/10, 4/12 + 2/12, 3/4 - 1/4, 1 - 1/2, 5/8 - 1/8, 5/6 - 2/6, 6/10 - 1/10, Incorrect: 1/2 + 1/4, 1/2 + 1/3, 4/5 - 2/5, 4/7 - 1/7, 7/9 - 1/9,

09-Addition and Subtraction of Fractions

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