Cross Mejia
02/07/2024 · Primary School
Her work is shown below. \( -15 \frac{1}{2}+5 \frac{3}{4} \) \( =-\frac{31}{2}+\frac{23}{4} \) \( =-\frac{31}{2} \times \frac{23}{4} \) \( =-\frac{713}{8} \) When she checked the answer by estimating, it did not make sense. What error did Wen make? Wen incorrectly converted a mixed number to an improper fraction. Wen added the numerators and denominators instead of multiplying. Wen did not take the reciprocal of the divisor. We the division problem to multiplication.
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Wen incorrectly multiplied instead of adding the fractions.
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