Wednesday, 2 January 2019

DAY 2 WEEK 1 Activity 3: Weird and Wonderful [10 points]

Activity 3: Weird and Wonderful [10 points]
New Zealand is just one of many countries that has amazing plants and trees. In fact, the African desert is home to some pretty incredible plants, like the cactus. Some cacti are able to survive on as little as 3 millilitres (ml) of water a day. Wow!
Let’s imagine that you are given a cactus for your birthday. To keep it alive, you must give it 3 ml of water every day.
Over one full year, how much water will you need to give your cactus plant?
On your blog, tell us how to solve this maths problem. You can write your answer in words, use a Sketchpad image, or post a video explaining how you would figure it out. Be sure to give us your final answer in millilitres (ml).

TASK DESCRIPTION: for this task i had to solve
a maths problem about a cactus. this maths problem involed using Times and
Addition. i had to work out how much water a cactus would need if it had needed 
3 mls a day in a year which is 365 days. here how i have been solving it out.


  1. Hello Hilary, it's Billy here from the Summer Learning Journey. I did some commenting on your blog posts last summer - I wonder if you remember?

    It's fantastic to see that you are still so motivated and hard working as you were last year. Keep it up!

    I love the way you've presented your working using a diagram and pictures to match. I had no idea you had so much experience in cactus maths! To tell you the truth I hadn't heard of cactus maths until a few days ago.

    I like that you've shown your working too. I used the exact same partitioning strategy as you. 365 was a bit of a messy number, so I separated it into 300, 60 and 5. I found those numbers to much 'tidier' and easier to work with.

    So how much water would the cactus have needed if it was a leap year?

    Can you convert the answer into litres?

    How much water would three cacti need over a year?

    Thanks Hilary, I thought you could use some extension questions!

  2. Hi Hilary,

    I am thrilled to see you blogging again this summer; you are awesome! I thought this was a really good strategy to use to solve this problem. I also liked how you used the google draw to show each step - keep up the great work!