Correct: 8/2 + 2/2 = 10/2, 5/3 - 3/3 = 2/3, 1/4 + 3/4 = 4/4, 5/5 - 5/5 = 0, 1/9 + 2/9 = 3/9, Incorrect: 8/5 + 3/5 = 9/5, 3/6 + 1/6 = 7/6, 2/1 - 1/1 = 3/1, 4/7 - 3/7 = 1/7, 4/10 - 2/10 = 5/10,

Adding and Subtracting Fractions with Common Denominators

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