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DECIMALS Adding & Subtracting. Decimals What is a Decimal? Show Me 1Show me 2 They should know How are they used? Click any.

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Presentation on theme: "DECIMALS Adding & Subtracting. Decimals What is a Decimal? Show Me 1Show me 2 They should know How are they used? Click any."— Presentation transcript:

1 DECIMALS Adding & Subtracting

2 Decimals What is a Decimal? Show Me 1Show me 2 They should know How are they used? Click any

3 Activities  Working with Decimals Working with Decimals Working with Decimals  Working with Decimals 2 Working with Decimals 2 Working with Decimals 2  Own my Own

4 Definition A number that uses place value and a decimal point to show A number that uses place value and a decimal point to show  Tenths  Hundredth  Thousandths  And so on NEXT

5 Prior Knowledge NEXT Place Value Order of numbers Adding whole numbers Subtracting whole numbers

6 How am I used?  ADD  SUBTRACT  MULTIPLY  DIVIDE NEXT

7 45.12 + 3.71 = NEXT

8 45.12 + 3.71 NEXT Align my decimals

9 Answer 45.12 + 3.71 48.83 NEXT

10 Check My Answer 48.83 - 3.71 45.12 NEXT Notice This was my answer T h i s i s w h a t I s t a r t e d w i t h

11 ADDINGSUBTRACTINGAnswer 45.12 + 3.71 48.83 next Check My Answer 48.83 - 3.71 45.12 NEXT Notice This was my answer This is what I started with

12 123 + 0.0079 + 43.5 = NEXT

13 123.0000 123.0000 0.0079 0.0079 + 43.5000 NEXT Check out the zeros

14 Answer 123.0000 123.0000 0.0079 0.0079 + 43.5000 166.5079 166.5079 NEXT

15 NOW LET’S TRY IT ON OUR OWN

16 Activities 1111 Push Here Push Here 2222 PPPP uuuu ssss hhhh H H H H eeee rrrr eeee

17 http://standards.nctm.org/document /eexamples/chap4/4.5/index.htm http://standards.nctm.org/document /eexamples/chap4/4.5/index.htm

18 Mathematics - Number Sense - Addition of Numbers with Three Decimal Digits Mathematics - Number Sense - Addition of Numbers with Three Decimal Digits

19 Closure  Journal prompt: Three ways I use decimals in my life are ---- Three ways I use decimals in my life are ----

20 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


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