Thursday, 7 March 2019

Ratio with Raro

WALT: Identify the relationship between numbers.

This week, Room 4 maths have been learning about Ratio. We realised how often we need to calculate ratio in the real world and that it is particularly important for us to know when we cook. We decided to investigate this in our DMIC problem involving raro.

Question 1 ~ Mrs Stone bought 80g packets of Raro. Each packet creates 5 200ml serving. How many packets should Mrs Stone buy to serve the whole class?
 We figured out she needed to buy 7 packets, because 7 x 5 = 35. She would have three servings left over, but you can't buy less than a whole packet!

Question 2 ~ If 80g of Raro makes 5 servings, what is the ratio of raro to water for one serving?
80g : 1000ml
16 : 200ml 

16 was the answer we found to solve this problem. The packet said that each serving required 200ml of water. We knew that 200 x 5 is 1000 and that 5 x 16 is 80.
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After getting through each problem we got to test out the ratio by making 5 cups of raro. We used all the knowledge that we learnt to make sure everyone had an even amount of the ingredients like water and we knew how much powder to put in each cup.

6 comments:

  1. Hello room 4 I'm Jacob from Yaldhurst Model school I'm a year 8. I really like this blog post. About how many Raro makes 5 I like that you. say how many packets mrs stone well buy. So keep up the good work room 4 and try your best at everything.

    From Jacob

    ReplyDelete
  2. Kia Ora my name is Kaleb and I am a year 8 student at Grey Main School.

    I think this is a great blog post. We have been doing some work around ratio at our school.

    Kai pai
    From Kaleb.

    ReplyDelete
  3. Ki ora Room 4. I really really like the work you have been doing.
    But maybe next time you could add more pictures next time.
    I like how much writing you have put in.
    Great job from Oliver

    ReplyDelete
  4. This comment has been removed by the author.

    ReplyDelete
  5. Kia Ora my name is James. I am a year 8 student at Grey Main School. I like this blog post because you described how you worked it out, good job
    From James

    ReplyDelete
  6. Hello room 4 I'm Teegab from Yaldhurst Model school I'm a year 7. I really like this blog post. About how many Raro makes 5 I like that you. say how many packets mrs stone well buy. So keep up the good work room 4 and try your best at everything.

    -Teegan Ducharme

    ReplyDelete