Page 300 - Math Smart - 7
P. 300
Check My
Understanding
O A machine packs 40 000 eggs in 5 h. How many eggs can it pack in 8 hours?
O Shane is paid $6.50 for an hour's work. How much is he paid if he works for
a) 4 hours? b) 11 hours?
O Bottles of juice cost 89 cents each. How much would
a) 5 bottles
b) 12 bottles
c) 25 bottles
of the juice cost?
O 12 exercise books have a total mass of 504 g. Work out the mass of
a) 6 exercise books, b) 3 exercise books and c) 24 exercise books.
O Felicia is paid $23.36 for 4 hours of work. How much is she paid for 12 hours' work?
O 5 identical cricket balls have a total mass of 700 g.
a) What is the mass of 1 cricket ball?
b) What is the mass of 8 cricket balls?
O The instruction on a bottle of fruit squash says, "Mix 1 part squash with 6 parts of water".
a) Write this as a ratio.
b) If you use 80 ml of squash, how many millilitres of water is needed?
© An American tourist changes some American dollars (US$) into Philippine peso (f).
She receives ^54.10 for each American dollar.
How many peso does she get for US$160?
O Three tourists from South Africa arrive in Australia for a holiday.
They exchange South African rand (R) into Australian dollars ($).
Xoli changes R500 and receives A$49.
a) Jannie changes R800. How many Australian dollars does he receive?
b) Charlene receives A$64.68 for the amount of rands she changes. Work out the amount of
rands she changes.
Try and Apply!
This is a recipe for making an apple pie. It makes
enough pie for 4 people. butter
a) How many apples are needed to make an apple
pie for 8 people?
b) What is the mass of butter needed to make an
self-raising pour
apple pie for 2 people?
c) Write down the ingredients needed for an
apple pie for 12 people.
UMIT 13 Ratio, Rate and Proportion
