Five companies employed \( 2340,3455,765,960 \) and 1350 workers. The first t companies laid off 1 worker for every 5 while the other three recruited 2 new every 3 . a) What was the total number of workers at the beginning?

k) \( \frac{1}{6}-\frac{1}{8}= \)

k) \( \frac{15}{4}-\frac{7}{8}= \)

A shopkeeper sells pencils for \( ₹ 12.50 \) each. If a customer pays with a ₹ 100 note, how many pencils can they buy, and how much money will be left as change? Simplify:

(Hint: Represent the movements using integers.) A baker makes 24 cupcakes. She sells \( 2 / 3 \) of them and gives \( 1 / 4 \) of the total cupcakes to her friends. How many cupcakes are left?

Simplify: \( (25 \div 5) \times(12-8)+15 \). Now, swap the division and subtraction operations and simplify again. the results the same? Why or why not?