October 14

Maths Mate Sheet 1 Question 23 (Term 4 2014)

Prediction: I predict this problem will be about predicting or estimating.

Read: I think of a number , subtract 5 and then divide it be 3. If the result is 6, what was the original number?

Clarification: None needed.

The Big Question: What was the original number?

Mathematician’s Toolbox: Work backwards/Have I seen a similar problem?

Solving: First I worked backwards from 6. I used multiplication because division is multiplication backwards. So I did 6 times 3 which is 18. After that I added 5 because subtraction is the inverse operation of addition. So I added 5 and I got the result of 23.

Conclusion: So the answer was 23.


Posted October 14, 2014 by Rat in category maths, Other, Uncategorized

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