Expressing missing number problems algebraically

Maths

Calculation problems

Which expression would represent the following problem:  The cooking time for roast beef is 30 minutes for every kg plus an additional 15 minutes.

Which expression would represent the following problem:  The cost of a photo album book is £2.50 for binding and printing with an additional cost of 15p per photograph.

Which expression would represent the following problem: A singer makes money from selling music. They pay a one-off fee of £25.00 to Oak-Tunes for marketing and distribution costs and receive 55p for each copy of the album sold.

Instead of writing 5 x a in an algebraic expression, what could I write instead?

How could we express the perimeter of the rectangle below?

How could we express the perimeter of the square below?

This lesson will soon be taken down.

Expressing missing number problems algebraically

Lesson outcome