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N
u
m
b
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(
a
d
d
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s
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b
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S
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d
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f
a
c
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f
a
m
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(
a
+
b
=
c
,
c
-
b
=
a
)
R
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p
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s
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n
t
a
t
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f
a
d
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s
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b
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b
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c
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S
t
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g
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s
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S
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S
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N
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L
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s
f
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P
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w
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p
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2
0
A
d
d
3
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w
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d
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b
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W
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I
A
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5
0
Lesson
Practice
A
d
d
m
i
s
s
i
n
g
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l
e
m
e
n
t
s
t
o
m
a
k
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a
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m
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n
t
t
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w
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t
h
t
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a
l
s
u
p
t
o
5
0
I
n
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q
u
a
l
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t
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e
s
w
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t
h
a
d
d
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o
n
a
n
d
s
u
b
t
r
a
c
t
i
o
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s
t
a
t
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m
e
n
t
s
A
d
d
3
n
u
m
b
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r
s
I
I
A
d
d
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d
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b
t
r
a
c
t
t
h
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d
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g
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t
n
u
m
b
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r
s
I
A
d
d
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d
s
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b
t
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c
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t
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d
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g
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b
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I
I
A
d
d
a
n
d
s
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b
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c
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f
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d
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g
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I
A
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d
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I
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W
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d
s
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c
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C
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m
p
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t
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m
e
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t
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m
a
k
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a
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a
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b
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u
p
t
o
1
0
0
A
d
d
3
n
u
m
b
e
r
s
(
m
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x
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f
s
i
n
g
l
e
,
t
w
o
a
n
d
t
h
r
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d
i
g
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n
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b
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s
)
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Complete statements to make a target number up to 50
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