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Adding Two or Three Numbers

T.I.P.S.


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The student must be able to solve addition and subtraction problems by applying the properties of operations. They must be able to explain how they solved the problem and how they know they are correct.

Example


Johnny has 6 pennies in a bowl. Nine pennies are in his drawer and 4 pennies are in his pocket. How many pennies does Johnny have? Explain your thinking with a math drawing and a number sentence. 

Hint 

Possible Solutions 

Digital Tools


Click on the following links for interactive games.

Adding Three Numbers 

Sum of All 

Magic Triangle  

Resources


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TEKS


1.5 Algebraic reasoning. The student applies mathematical process standards to identify and apply number patterns within properties of numbers and operations in order to describe relationships. The student is expected to:

(G) apply properties of operations to add and subtract two or three numbers

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