SLJ

In the middle of winter it can get quite wet and damp in New Zealand, can’t it? When it
gets really damp, it is common for things like mould and fungi to start to grow. We can
often see them on the walls, ceilings or floors of our houses or outside on footpaths,
buildings or roadways. Some types of mould and fungi are so small that they can’t be
seen. Some of these tiny fungi/mould can be found in the air. They are called ‘airborne
fungi’ and they can be unhealthy for us.

Let’s imagine that we tested the air in your classroom and found 7 different kinds of
mould. Eek! The cleaner says that it takes 5 days for each mould to be eradicated
(removed). If the school had to remove each mould one at a time, how long would it
take to remove all the mould from the classroom?

On your blog, tell us how you would solve this tricky maths problem. Be sure to also
post your final answer in days or weeks.

7 moulds

5 days for each mould to be removed

1 mould = 5 days

1 mould = 5 days

1 mould = 5 days

1 mould = 5 days

1 mould = 5 days

1 mould = 5 days

1 mould = 5 days

= 35 days to eradicate 7 moulds from the classrom

This is how I solved my problem.