Module 11

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Activity 1 : : Activity 2

Activity 2: Key Strokes

Basic Operations of a Four Function Calculator (+, -, x, ÷)
Special Operations (These are helpful, but not required.)
- Fraction Key
- Exponent Key

Avoid the pitfall of using a calculator for every computation. You need to recognize when to use order of operations to make a problem easy to do in your head. Keep in mind that you don't have to do mathematical expressions always from left to right. For instance:

15.50 - 13.22 - 6.78

You can easily do this in your head if you add the two negative numbers first, and then subtract.

= 15.50 - 20.00

= - 4.50

Remember order of operations state that addition and subtraction have the same order so you do not need to go left to right. Thus, no calculator is needed on this one, because you can easily do it in your head.

It is helpful to strongly develop your mental math skills. Here is a link to Funbrain that has fun games to practice your order of operations skills:

http://www.funbrain.com/algebra/index.html

Resources:

MyMathLab Complete Steps 1-4 in Module 11 on Calculator Use.

All students should go to the community and participate in the module exercises.

Copyright 2008, by the Contributing Authors. Cite/attribute Resource. rbennett1. (2007, September 28). Module 11. Retrieved November 21, 2009, from Western Governors University Web site: http://ocw.wgu.edu/liberal-arts/interdisciplinary-studies-mathematics/module-11-1. This work is licensed under a Creative Commons License.

Course Contents Interdisciplinary Studies Mathematics Home Module 1 - Orientation Module 2 - Learning Resources and Pre-instructional Activities Module 3 - Number Sense & Numeration Module 4 - Real Number System Module 5 - Algebraic Concepts Module 6 - Geometry, Angles, Pythagorean Theorem Module 7 - Measurement Module 8 - Probability & Statistics Module 9 - Mathematical Reasoning Module 10 - Mathematical Problem Solving Module 11 - Calculator Use Task6PartCHelp Task4Help	Personal tools Log in You are here: Home → Liberal Arts → Interdisciplinary Studies Mathematics → Module 11
	Info Module 11 Document Actions Activity 1 : : Activity 2 Activity 2: Key Strokes Basic Operations of a Four Function Calculator (+, -, x, ÷) Special Operations (These are helpful, but not required.) Fraction Key Exponent Key Avoid the pitfall of using a calculator for every computation. You need to recognize when to use order of operations to make a problem easy to do in your head. Keep in mind that you don't have to do mathematical expressions always from left to right. For instance: 15.50 - 13.22 - 6.78 You can easily do this in your head if you add the two negative numbers first, and then subtract. = 15.50 - 20.00 = - 4.50 Remember order of operations state that addition and subtraction have the same order so you do not need to go left to right. Thus, no calculator is needed on this one, because you can easily do it in your head. It is helpful to strongly develop your mental math skills. Here is a link to Funbrain that has fun games to practice your order of operations skills: http://www.funbrain.com/algebra/index.html Resources: MyMathLab Complete Steps 1-4 in Module 11 on Calculator Use. All students should go to the community and participate in the module exercises. Copyright 2008, by the Contributing Authors. Cite/attribute Resource. rbennett1. (2007, September 28). Module 11. Retrieved November 21, 2009, from Western Governors University Web site: http://ocw.wgu.edu/liberal-arts/interdisciplinary-studies-mathematics/module-11-1. This work is licensed under a Creative Commons License.	Reuse Course Download this course Export into OpenOCW

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