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