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Sally claims that it is easier to add two fractions if she
adds the numerators and then adds the denominators.
How can you help her?

  • math -

    I can't help Sally if she insists on making up her own rules.

    Tell Sally she has to make sure there are common denominators first. Otherwise she will get the wrong answer.

  • mat -

    Even then she's wrong:

    3/2 + 5/2 = 8/2, not 8/4

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