<s>
Keisan	B-Application
Game	I-Application
Sansū	O
Series	O
(	O
Calculation	O
Game	O
:	O
Arithmetic	O
series	O
)	O
is	O
a	O
video	O
game	O
series	O
focusing	O
on	O
elementary	O
arithmetic	O
calculation	O
of	O
basic	O
math	O
,	O
featuring	O
addition	O
,	O
subtraction	O
,	O
multiplication	O
,	O
division	O
,	O
decimals	B-Application
,	O
and	O
fractions	O
.	O
</s>
<s>
Even	O
though	O
this	O
game	O
is	O
educational	O
,	O
players	O
can	O
only	O
incorrectly	O
answer	O
five	O
times	O
before	O
a	O
game	B-Application
over	I-Application
.	O
</s>
<s>
Even	O
though	O
this	O
game	O
is	O
educational	O
,	O
players	O
can	O
only	O
incorrectly	O
guess	O
five	O
times	O
before	O
"	O
dying	O
"	O
and	O
being	O
given	O
a	O
game	B-Application
over	I-Application
message	O
.	O
</s>
<s>
Only	O
five	O
incorrect	O
answers	O
and	O
being	O
hit	O
by	O
"	O
enemy	O
"	O
are	O
accepted	O
before	O
the	O
game	B-Application
prematurely	I-Application
ends	I-Application
.	O
</s>
<s>
This	O
video	O
game	O
is	O
an	O
educational	O
game	O
teaching	O
four	O
basic	O
principles	O
:	O
division	O
,	O
adding/subtracting	O
decimals	B-Application
,	O
adding/subtracting	O
fractions	O
and	O
multiplying/dividing	O
decimals	B-Application
.	O
</s>
<s>
In	O
the	O
"	O
Division	O
"	O
and	O
"	O
Decimal	B-Application
Addition	O
&	O
Subtraction	O
"	O
challenges	O
,	O
players	O
have	O
to	O
control	O
a	O
man	O
as	O
he	O
tries	O
to	O
destroy	O
monsters	O
inside	O
a	O
dungeon	O
with	O
a	O
sword	O
.	O
</s>
<s>
The	O
other	O
challenges	O
result	O
in	O
having	O
to	O
control	O
a	O
race	O
car	O
as	O
it	O
navigates	O
through	O
a	O
complex	O
labyrinth	B-Application
.	O
</s>
