Transcript DECIMALS - Galena Park Independent School District

DECIMALS
Adding & Subtracting
Decimals
What is a Decimal?
Click any
They should know
How are they used?
Show Me 1
Show me 2
Activities

Working with Decimals

Working with Decimals 2

Own my Own
Definition
A number that uses place value
and a decimal point to show
 Tenths
 Hundredth
 Thousandths
 And
so on
NEXT
Prior Knowledge
Place Value
Order of numbers
Adding whole numbers
Subtracting whole numbers
NEXT
How am I used?

ADD


SUBTRACT
MULTIPLY

DIVIDE
NEXT
45.12 + 3.71 =
NEXT
Align my
decimals
45.12
+
3.71
NEXT
Answer
45.12
+
3.71
48.83
NEXT
Check My Answer
Notice
This was
my answer
48.83
3.71
45.12
NEXT
ADDING
SUBTRACTING
Answer
Check My Answer
45.12
+
3.71
48.83
Notice
This was my
answer
48.83
3.71
45.12
next
NEXT
123 + 0.0079 + 43.5 =
NEXT
Check out
the zeros
123.0000
0.0079
+ 43.5000
NEXT
Answer
123.0000
0.0079
+ 43.5000
166.5079
NEXT
NOW
LET’S TRY IT
ON OUR
OWN
Activities
1
Push Here
2
Push Here
http://standards.nctm.org/document
/eexamples/chap4/4.5/index.htm
Mathematics - Number Sense Addition of Numbers with Three
Decimal Digits
Closure
 Journal
prompt:
Three ways I use decimals in my life
are ----
TEKS 6.12

The student communicates about Grade 6
mathematics through informal and
mathematical language, representations,
and models.
A. communicate mathematical ideas using language,
efficient tools, appropriate units, and graphical,
numerical, physical, or algebraic mathematical models
B. evaluate the effectiveness of different
representations to communicate ideas