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A wall is being painted. of it was painted before lunch and after lunch. What fraction of the wall is painted in all? Give the answer in simplest form.

Class 6FractionsFractions
  • A
  • B
  • C
  • D

Step-by-Step Solution

Like fractions add by adding only the numerators: . Since 7 divides both parts, , which is the simplest form the question asks for. comes from adding the denominators too, which wrongly halves the answer.
Answer: C)

Key idea: Reading a fraction

A fraction a/b says: the whole is split into b equal parts, and we are talking about a of them. So 3/8 means: divide the whole into 8 equal parts, take 3 of them. The two equal parts is what makes it a fraction — three slices of an unevenly cut cake do not give you 3/8. The denominator must always be a positive whole number. The numerator can be 0, equal to the denominator (giving 1), greater than the denominator, or less than it.

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