Teacher'S Letter To Family - New Math Unit Page 2
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1
2How To
subtract three-digit numbers
In this unit, I will be learning about adding and subtracting. This three-
digit subtraction problem is an example of what I will be learning.
Subtract 336 – 172.
Step 1
Step 2
Step 3
1
10
Show 336.
Subtract the hundreds.
Regroup
hundred as
tens.
Subtract the ones.
Subtract the tens.
H
T
O
H
T
O
H
T
O
2
13
2
13
3
3
6
3
3
6
3
3
6
1
7
2
1
7
2
1
7
2
–
–
–
4
6
1
4
6
4
These books link to the math in this unit.
We can visit
Education Place
at
We can look for them at the library.
for the
game, the
Math Lingo
Amanda Bean’s Amazing Dream
, and more games
Glossary
Story by Cindy Neuschwander
and activities to do together.
Math activities by Marilyn Burns
Pictures by Lisa Woodruff
(Scholastic Press, 1998)
Moira’s Birthday
Story by Robert Munsch
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Parent category: Letters