a) \( 7 \frac{4}{13} \cdot 5 \frac{5}{7}+7 \frac{4}{13} \cdot 7 \frac{2}{7} \);

3. (a5-g18-14) Ko'p qavatli uyning 4 - qavatigacha bo'lgan masofa 12 metr. Shu uyning 12 -qavatigacha bo'lgan masofa necha metr? \( \begin{array}{llll}\text { A) } 48 & \text { B) } 44 & \text { C) } 36 & \text { D) } 33\end{array} \)

83 Найдите произведение: \( \begin{array}{l}\text { а) } \frac{4}{9} \cdot \frac{9}{7} \cdot \frac{7}{17} \cdot \frac{17}{28} ;\end{array} \)

c) \( \frac{5}{6}-\frac{7}{8}+\frac{11}{12} \)

Exercise 4.1 1 Work out the highest common factor (HCF) of \( \begin{array}{ll}\text { a } 8 \text { and } 12 & \text { b } 6 \text { and } 15 \\ \text { c } 7 \text { and } 35 & \text { d } 24 \text { and } 40\end{array} \) \( \begin{array}{l}2 \text { Which fraction is larger in each pair? }\end{array} \)

e) \( 1 \frac{1}{3}+2 \frac{1}{4}-3 \frac{5}{12} \)