ELL Math
NOTES
Name _______________________
Topic: Place Value of Numbers
Period _______ Date_________
Questions/Main Ideas
Vocabulary:
our
Our Number System is based on ten.
Using only ten symbols (called Digits) we can write any number.
The Ten Digits
The Digits we use today are called "Hindu-Arabic Numerals" and look like these:
only
0 1 2 3 4 5 6 7 8 9
You can use these numbers to count up to 9.
based on
called
count up to
Ten Or More ...
When we have more than 9 items, we start another column - the "tens" column - and
we write down how many "tens" we have, followed by how many ones (called
"units"):
Tens
1
Units
2
items
before the point
after the point
The Number "12"
So we know that we have 1 Ten and 2 Ones, which makes 12.
decimal point
Write the place value of each number.
23 __________________________ 45 ___________________________
chart
91 __________________________ 72 ___________________________
19 __________________________ 27 ___________________________
big
bigger
A Hundred Or More ...
When we have more than 99 items, we start
another column - the "hundreds" column. Now we need to show how many
hundreds, tens and units:
Hundreds
1
Tens
4
small
smaller
The Number 143
great
greater
large
larger
Units
3