(7) Exercise 2.10 1. Convert the following unlike fractions into like fractions. \( \begin{array}{lll}\text { (a) } \frac{3}{4} \text { and } \frac{1}{3} & \text { (b) } \frac{3}{8} \text { and } \frac{5}{12} & \text { (c) } \frac{4}{15} \text { and } \frac{7}{5}\end{array} \)

Find the prime factorization of 2025 . \( \square \) Hint

Use prime-factorization to find the greatest common divisor (also called greatest common factor) and least common multiple of 336 and 252 . \( \operatorname{gcd}(336,252)=\square \) \( \operatorname{lcm}(336,252)=\square \)

Martin decided to buy 2 bags of grapes weighing \( 5 \frac{2}{3} \) pounds each, instead of the 3 bags weighing \( 4 \frac{1}{5} \) pounds each, because the bigger bags were on sale. Did he end up with more grapes or less grapes by buying the bigger bags? He ended up with about One-half pound more grapes. He ended up with about 1 pound less grapes. He ended up with about One-half pound less grapes.

Bisa and Ibrahim both did their laundry today. Bisa does laundry every 5 days and Ibrahim does laundry every 10 days. How many days will it be until Bisa and Ibrahim both do laundry on the same day again? days

Anine løper ei løype på \( 12,35 \mathrm{~km} \). Inge løper samme løype to ganger. Hvor langt løper de til sammen?