Page 132 - NUMINO Challenge_D2
P. 132
Basic Concepts Solve Problems by Drawing Pictures
If the situation in a problem is complex, it is often hard to understand the
situation just by thinking about it. In this case, you can grasp the heart of
the problem more easily by drawing a simple picture that represents it.
Example After selling cookies, Kate needed to go home by going over three
hills. However, a robber appeared on every hill and said that he
would not hurt her if she gave him two more than half of the
remaining cookies. After Kate went over three hills and arrived
home, there was only one cookie left. How many cookies did Kate
have at first after selling them in the market?
Class Notes
When Kate was going over the third hill, Kate had one cookie left after giving the third
robber two more than half of the remaining cookies.
one cookie two cookies cookie
The remaining The cookies given to
cookies after going the third robber
over the third hill
The number of cookies remaining before going over the third hill:
12 (cookies)
You can find the remaining number of cookies before going over the second hill by using
the method from .
cookie two cookie
cookies
The remaining The cookies given to
cookies after going the second robber
over the third hill
The number of cookies remaining before going over the second hill: cookies
You can find the remaining number of cookies before going over the first hill by using the
method from . cookie cookie
two
cookies
The remaining cookies The cookies given to
before going the first robber
over the second hill
The remaining number of cookies before going over the first hill: cookies
129Communication
If the situation in a problem is complex, it is often hard to understand the
situation just by thinking about it. In this case, you can grasp the heart of
the problem more easily by drawing a simple picture that represents it.
Example After selling cookies, Kate needed to go home by going over three
hills. However, a robber appeared on every hill and said that he
would not hurt her if she gave him two more than half of the
remaining cookies. After Kate went over three hills and arrived
home, there was only one cookie left. How many cookies did Kate
have at first after selling them in the market?
Class Notes
When Kate was going over the third hill, Kate had one cookie left after giving the third
robber two more than half of the remaining cookies.
one cookie two cookies cookie
The remaining The cookies given to
cookies after going the third robber
over the third hill
The number of cookies remaining before going over the third hill:
12 (cookies)
You can find the remaining number of cookies before going over the second hill by using
the method from .
cookie two cookie
cookies
The remaining The cookies given to
cookies after going the second robber
over the third hill
The number of cookies remaining before going over the second hill: cookies
You can find the remaining number of cookies before going over the first hill by using the
method from . cookie cookie
two
cookies
The remaining cookies The cookies given to
before going the first robber
over the second hill
The remaining number of cookies before going over the first hill: cookies
129Communication
