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u
m
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r
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r
d
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a
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E
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p
a
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d
N
o
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R
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b
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1
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1
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N
u
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,
w
o
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d
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a
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y
m
b
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l
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g
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n
u
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N
u
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b
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r
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,
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d
s
a
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d
s
y
m
b
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u
p
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O
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N
u
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s
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u
p
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m
i
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P
a
r
t
i
t
i
o
n
i
n
g
N
u
m
b
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s
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u
p
t
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m
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i
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)
R
o
u
n
d
n
u
m
b
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r
s
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t
o
1
0
0
0
'
s
)
R
o
u
n
d
w
h
o
l
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n
u
m
b
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s
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t
o
1
0
0
0
0
0
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E
s
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m
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t
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R
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d
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N
u
m
b
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s
,
w
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a
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d
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y
m
b
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l
s
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i
n
b
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O
r
d
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n
u
m
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s
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b
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l
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C
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n
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t
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u
c
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N
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b
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u
p
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m
i
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P
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t
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n
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b
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C
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t
r
u
c
t
n
u
m
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b
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Lesson
Practice
C
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p
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e
n
u
m
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s
u
p
t
o
m
i
l
l
i
o
n
s
C
o
m
p
a
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e
n
u
m
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b
i
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Hong Kong
Stage 2
Construct numbers (billions)
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