Sending soccer balls

This task is about calculating weight.
 
soccer-balls.png
A sports store wants to send 24 soccer balls to a school. The weight of four balls is 1.24 kg.
(1,000 grams = 1 kg)

Question 2Change answer

a)  How heavy is each ball in grams?  g

 
b)  How heavy is 30 balls in kilograms? kg

Question 2Change answer

New Zealand Post limits the weight of each parcel to 3 kg.
c)  What is the maximum number of balls in a parcel weighing 3 kg?

 
d)  What is the smallest number of parcels that will be needed for 24 balls?