PART
2
Understanding
P lace
V alue
W hen
R eading
a nd
W riting
Numbers
We
u se
t he
d igits
0 ,
1 ,
2 ,
3 ,
4 ,
5 ,
6 ,
7 ,
8 ,
a nd
9
t o
w rite
n umbers.
T he
v alue
o f
e ach
digit
o r
n umeral
d epends
o n
i ts
p osition
o r
p lace.
You
c an
u se
p lace
v alue
m odels
t o
s how
n umbers.
10
o nes
=
1
t en
10
t ens
=
1
h undred
10
h undreds
=
1
t housand
Example:
Look
a t
t he
p lace
v alue
m odels.
W hat
n umber
i s
s hown?
2
h undreds
4
t ens
3
o nes
The
s tandard
f orm
i s
2 43
You
r ead
2 43
a s
t wo
h undred
f orty-‐three.
The
v alue
o f
t he
d igit
2
i s
2 00.
T he
v alue
o f
t he
4
i s
4 0.
T he
v alue
o f
the
3
i s
3 .
The
e xpanded
f orm
i s:
200
+
4 0
+
3
=
2 43
Module
1 :
R eading
a nd
W riting
R eal-‐Life
N umbers
4