Rates

Unit rate

100

$200 for 5 hours work. What is the rate $/hr?

$40 / hr

200

120 km in 4 hours.  What is the speed km/hr?

30 km/hr

300

72 cakes decorated in 3 hours.  How many cakes per hour?

24 cakes/hour

400

7g of salt is dissolved in 100mL of water.  What is the concentration g/L?

70 g/L

500

150g of sugar is dissolved in 200mL of water.  What is the concentration (g/L)?

750 g/L

Speed distance time

100

80km/hr.  How far in 3 hours?

240km

200

11 m/s.  How far in 5 seconds?

55 m

300

13km/hr.  How far in 5 hours?

65km

400

If I am travelling at 6km/hr, what is the speed in m/s?

1.67 m/s

500

I am travelling at 5m/s.  What is the speed in km/hr?

18 km/hr

Fruit shop

100

Potatoes cost $3.90/kg.  How much for 4 kg?

$15.60

200

Grapes cost $29.99/kg.  How much for 3.5kg?

$104.97

300

Apples cost $5.60/kg.  How MUCH can I buy with $15?

2.68 kg

400

Watermelon costs $6.10/kg.  How MUCH can I buy with $10?

1.64 kg

500

It costs $31.20 to buy 6kg of oranges.  What is the cost of oranges ($/kg)

$5.20

Best buy

100

Which is the better buy?

a) 1.2 kg for $20.00 

b) 0.5 kg for $10

a

200

Which is the better buy?

a) $3.20 for a pack of 5

b) $7.00 for a pack of 12

b)

300

Which is the better buy?

a) $120 for 3 items

b) $190 for 5 items

b)

400

Which is the better buy?

a) 120 g for $7.20

b) 500 g for $36

a)

500

Which is the better buy?

a) 1.6kg for $11.60

b) 1.8kg for $13.80 

a)