Question

A maths teacher bought 40 calculators at $8.20 each and a number of other calculators costing $2.95 each.In all she spent$387. How many of the cheaper calculators did she buy?

Answer 1

40 x $8.20 = $328

$387 - $328 = $59

$59 ÷ $2.95 = 20 calculators