Predict:
I predict this problem will use addition.
Read:
Five ballpoint cost as much as two fountain pens. How much are six fountain pens if one ballpoint pen cost $1?
Clarify:
There were no words I needed to clarify.
Big Question:
How much are six fountain pens if one ballpoint pen cost $1?
Mathematicians Toolbox:
The strategy I used was guess ,check and improve
Solve:
To solve this problem I used the picture provided which shows 5 ballpoint pens and two fountain pens. Under each ballpoint pen I drew ‘$1’ and as there were 5 the all cost $5, I then split $5 by 2 to get $2.50 for each fountain pen. To get my final answer I multiplied $2.50 by 6 as that was the big question. I got the answer $15
Summary:
My prediction was correct because I used addition.