a
)
A
60cm
x
80cm
board
is
____________________
cm2
,
which
is
the
same
as
____________________
dm2
.
b
)
If
the
wood
costs
?
0
,
1
/
dm2
,
the
total
cost
of
the
board
would
be
____________________
.
____________________
?
.
c
)
To
make
a
wooden
object
we
can
buy
the
60
x
80
cm
board
above
or
two
boards
that
measure
30
x
40cm
at
?
0
,
25
/
dm2
each
.
So
these
boards
(
30x40cm
)
are
____________________
dm2
and
the
cost
of
each
one
will
be
____________________
?
d
)
Which
option
would
be
cheaper
(
Option
A
:
One
60x80cm
board
-
Option
B
:
Two
30x40cm
boards
)
?
The
cheapest
one
will
be
the
option
____________________
.
