Question 1: A proper fraction has a numerator smaller than the denominator. When subtracting proper fractions with the same denominator, subtract the numerators and keep the denominator the same. For example, \( \frac{3}{7} - \frac{1}{7} = \frac{2}{7} \).

Answer: N/A

Question 1: Calculate: \( \frac{5}{9} - \frac{2}{9} \).

Answer: 3/9 or 1/3

Question 2: Subtract: \( \frac{7}{12} - \frac{4}{12} \).

Answer: 3/12 or 1/4

Question 3: Find the difference: \( \frac{8}{15} - \frac{5}{15} \).

Answer: 3/15 or 1/5

Question 1: Calculate: \( \frac{9}{20} - \frac{4}{20} \).

Answer: 5/20 or 1/4

Question 2: Subtract: \( \frac{11}{18} - \frac{7}{18} \).

Answer: 4/18 or 2/9

Question 3: Find the difference: \( \frac{13}{25} - \frac{9}{25} \).

Answer: 4/25

Question 4: Calculate: \( \frac{17}{24} - \frac{9}{24} \).

Answer: 8/24 or 1/3

Question 1: Sara had \( \frac{7}{10} \) of a chocolate bar. She ate \( \frac{2}{10} \) of it. How much of the chocolate bar does she have left? Show your working.

Answer: 5/10 or 1/2

Question 2: A recipe requires \( \frac{3}{4} \) cup of sugar. If you use \( \frac{1}{4} \) cup less than the recipe calls for, how much sugar do you use? Show your working.

Answer: 1/2

Question 1: Calculate: \( \frac{19}{30} - \frac{11}{30} \).

Answer: 8/30 or 4/15

Question 2: If you subtract \( \frac{4}{9} \) from \( \frac{7}{9} \), what is the result? Express your answer as a proper fraction.

Answer: 3/9 or 1/3

Question 1: A student calculated \( \frac{5}{8} - \frac{3}{8} = \frac{2}{6} \). Is this correct? If not, identify and correct the mistake.

Answer: No, subtract numerators: 5 - 3 = 2. Keep denominator 8. Correct answer: 2/8 or 1/4.

Question 2: Subtract: \( \frac{3}{7} - \frac{2}{7} \). Some students get an answer of \( \frac{1}{7} \), but others write \( \frac{1}{14} \). Which is correct? Explain why.

Answer: The correct answer is \( \frac{1}{7} \) because subtracting numerators directly: 3 - 2 = 1, denominator stays 7.