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4-57.

Rewrite each expression as a single fraction.

  1. When adding or subtracting fractions with a common denominator, add or subtract with the numerators only. Circle around the problem with arrow pointing to 3 plus 1 = question mark.

    Circle around the problem with arrow pointing to 3 plus 1 = question mark.

    The problem now reads, 3 eighths + 1 eighth = 4 eighths.

    The problem now reads, 3 eighths + 1 eighth = 4 eighths. Reduce if possible.

  1. See part (a).

  1. See part (a).