Maths , HNF

Please solve the following problems . Show your working so that we can understand your thinking.

GI Zoo Prices         Adult:              $14                                             Child under 12 : #

1. It cost the Naidoo family of 2 adults and 3 children $61 to go to the zoo. What is the missing price on the board?

2 x 14 = 28

61 - 28 = 33

33 ➗ 3 = $11 per child

2. For 4 days of the week the zoo has a concession for schools. $10 each for the first 100 children and then $12 each for the others. What would a school pay if there are 127 children?

10 x 100 = 1000

12 x 27 = 324

1000 + 324 = $1324

3. On a Friday evening  the zoo has a special rate for  school children:for every paid 7 children 2 get to go in free.  What would it cost a school with  147 children?

147 - 9 = 16 r3

16 x 7 = 112

112 x 11 = 1232

1232 + 33 = $1265