a) 3 * 7 * 9 = 189
b) 189 - 171 = 18
18/9 = ?
in a school each class has 7 charts to display on a notice board. Each chart must have 9 thumb tacks to support it.
a) How many tacks are needed if three classes have to display their charts on the notice board?
b) The three classes have a total of 171 tacks. How many charts could not be placed on the board?
3 answers
18 over 9
Hi I asked the question