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F
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c
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F
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2
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3
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4
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6
,
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A
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(
2
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4
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5
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6
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8
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1
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C
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C
x
a
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(
2
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3
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4
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5
,
6
,
8
,
1
0
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1
2
)
A
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F
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S
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N
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M
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f
f
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c
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s
(
2
,
3
,
4
,
6
,
8
,
1
0
,
1
2
,
1
0
0
)
C
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m
p
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m
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M
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p
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F
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c
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D
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d
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w
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b
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b
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f
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c
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F
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o
f
Q
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t
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s
(
u
n
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f
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c
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)
D
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v
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d
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g
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f
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c
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b
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w
h
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l
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m
b
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s
F
r
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c
t
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n
s
o
f
Q
u
a
n
t
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t
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e
s
(
s
i
m
p
l
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n
o
n
-
u
n
i
t
)
E
q
u
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v
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l
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t
F
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c
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n
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D
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v
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d
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g
F
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c
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f
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w
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F
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N
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c
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w
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h
f
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c
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s
Lesson
Practice
A
d
d
i
t
i
o
n
a
n
d
S
u
b
t
r
a
c
t
i
o
n
s
u
s
i
n
g
n
u
m
b
e
r
l
i
n
e
s
(
2
,
3
,
4
,
5
,
6
,
8
,
1
0
,
1
2
)
A
d
d
i
t
i
o
n
a
n
d
S
u
b
t
r
a
c
t
i
o
n
u
s
i
n
g
m
o
d
e
l
s
(
2
,
3
,
4
,
5
,
6
,
8
,
1
0
,
1
2
)
A
d
d
i
n
g
a
n
d
S
u
b
t
r
a
c
t
i
n
g
f
r
a
c
t
i
o
n
s
(
e
a
s
i
l
y
r
e
l
a
t
e
d
d
e
n
o
m
i
n
a
t
o
r
s
)
C
o
m
p
a
r
e
a
d
d
/
s
u
b
s
t
a
t
e
m
e
n
t
s
w
i
t
h
f
r
a
c
t
i
o
n
s
T
y
p
e
s
o
f
F
r
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c
t
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o
n
s
S
i
m
p
l
i
f
y
i
n
g
F
r
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c
t
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s
M
i
x
e
d
q
u
e
s
t
i
o
n
s
o
n
f
r
a
c
t
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o
n
s
(
c
o
m
p
a
r
i
n
g
,
e
q
u
i
v
a
l
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n
c
e
,
s
i
m
p
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i
f
y
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g
a
n
d
o
r
d
e
r
i
n
g
)
M
i
x
e
d
Q
u
e
s
t
i
o
n
s
o
n
F
r
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c
t
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s
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