Last week we did… Direct Proportion situations Direct Proportion situations Two quantities are said to be in direct proportion if they increase and decrease.

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Presentation transcript:

Last week we did… Direct Proportion situations Direct Proportion situations Two quantities are said to be in direct proportion if they increase and decrease at the same rate. That is, if the ratio between the two quantities is always the same.

Apply Learnt Knowledge Hands up….. If 4 monkeys eat 16 bananas in a minute?

T H I N K … ROBOTS DAYS

More or Less Method 5 robots  30 days 15 robots  ? (less) Less = PROPER FRACTION

Indirect/Inverse Proportion Two quantities are said to be in indirect/inverse proportion if as one quantity increases the other quantity decreases at the same rate.

It takes 10 men, 12 months to build a house. How long should it take 8 men?

Mini-whiteboard practise!

= 12 minutes

= 72 minutes 1 hr 12 minutes

If it takes 3 fashionistas 12 hours to make a fashionable dress, how long would it take 4 fashionistas working on the dress together?

If it takes 7 dwarfs, 3 hours to mine 100 diamonds, how long will it take 3 dwarfs to mine the same amount?

If it takes 3 cake makers 8 hours to make this birthday cake how long would it take 1 cake maker?

If it takes this class 8 minutes to finish a bag of sweets, how long would it take 16 people to finish the bag of sweets?

A quantity of hay is enough to feed 5 horses for 8 days. Work out the number of days that the same quantity of hay will feed 4 horses

Homework Pg 112 Exercise 5e No. 1,2,6 and 8