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# How do I add or subtract numbers in polar form or rectengular form

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In rectangular coordinates you subtract or add the x together and the y- together. The operations have meaning only if you are calculating the mid-point of a segment or the coordinates of a point that divides a segment in a certain ratio, or the barycenter of a distribution of points.
As to the question concerning vectors in polar coordinates, I do not think there exits a meaningful instance where you have to add the radii AND the angles. Radii add or subtract if the points are collinear (same angle). Angles add or subtract if the point are on a circle (same radius)/

Posted on Oct 17, 2013

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If one or both numbers are in polar form, convert it/them to rectangular. Once both numbers are in rectangular form, simply add the two components separately: Add the two x components together, and add the two y components together.

If you're asking how to do this on a particular calculator, please specify the make and model.

Posted on Oct 15, 2013

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Posted on Jan 02, 2017

how can i enter a polar form number with angle to convert into a complex numbe(a+bi)

Posted on Jan 14, 2011

No you cannot. An ordered pair made up of a radius and an angle is a vector. And you do not add nor subtract vectors as you would scalar (non vector) values.

Posted on Sep 03, 2011

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## Related Questions:

### If their are two negative numbers in a multi step equations i add or subtract to undo

That depends on what you're trying to undo. If the last thing you did was add, then you subtract to undo. If the last thing you did was subtract, then you add to undo.

May 07, 2014 | Computers & Internet

### Complex matrix

Is it complex or matrix? You can have only one mode at a time.What kind of equations? The solve function uses real-valued equations.
Complex numbers: You can add, subtract, multiply and divide. You can convert a number from rectangular to polar forms and vice-versa; you can calculate the absolute value of a complex number, or a conjugate.
All the operations are done in the Mode CMPLX.

Feb 04, 2014 | Casio FX991MS Scientific Calculator

### Can we find complex matrices using 991-es?

No!! The only complex number operations you can perform are addition, subtraction, multiplication, and division and raise to an integer power with positive exponent. You can also get the Argument or the conjugate of a number, convert a complex number from rectangular to polar forms and vice versa.
As to matrices, it can only handle up to 3X3 dimension with real coefficients.

May 09, 2012 | Casio FX991ES Scientific Calculator

### I m usinf casio fx-300 Es calculator. is it possible to do polar addition or subtraction without changing to rectangular form?

No you cannot. An ordered pair made up of a radius and an angle is a vector. And you do not add nor subtract vectors as you would scalar (non vector) values.

Aug 31, 2011 | Casio fx-300ES Calculator

### How do i program my calculator to add, subtract, divide and multiply imaginary numbers and get the correct answer?

Press MODE to bring up the mode screen. Use the arrow keys to move down to the line beginning "Real". Highlight either "a+bi" or "re ^ theta i" depending on whether you want to work in rectangular or polar coordinates, then press ENTER to save the change. Press 2ND [QUIT] to exit the mode screen.

Feb 17, 2011 | Texas Instruments TI-83 Plus Calculator

### Conversion of polar to rectangular form and vice versa

Conversion of polar form to rectangular:
• Switch to CMPLX mode: [MODE] [2]
• Enter complex number in polar form, e.g. r = 3, θ = 42°: 3 [SHFT] [(-)] 42 [=]
• Switch to rectangular view: [SHFT] [2] [4]
Conversion of rectangular to polar:
• Switch to CMPLX mode: [MODE] [2]
• Enter complex number in rectangular form, e.g. real part = 2, imag part = 3: 2 [+] 5 [ENG] [=]
• Switch to polar view: [SHFT] [2] [3]

Jan 12, 2011 | Casio FX991ES Scientific Calculator

### Converting between Forms When working with phasors it is often necessary to convert between rectangular and polar form. To convert from rectangular form to polar form: M = sqrt{A^2 + B^2} f =...

You can switch the display mode for complex numbers by pressing SHIFT MODE down 3 and picking one. This will display the current result in the selected mode.

You can also override the current display mode and specify the format. Add these keystrokes at the end of a calculation: SHIFT 2 then 3 for polar or 4 for rectangular.

Nov 24, 2010 | Casio FX-115ES Scientific Calculator

### How to add figures and then subtract from a larger number

use the + key after each number to add the total will appear on screen. When all numbers have been added, enter number to subtract and then press - key. The subtracted number will appear in read on the paper (if two color). and then press the star key to get total.

Jul 08, 2010 | Canon P23-DHV Calculator

### How do u put this in polynomial standard form x^7-x+x^3-x^5+x^10

Sorry, blue, but you're wrong. Standard form means the exponents are arranged in decreasing order. So this one is

(Sorry, but you lose out on the 4 thumbs.)

Mar 03, 2010 | SoftMath Algebrator - Algebra Homework...

### How do I add and subtract on this thing?

Hello,
I do know what calculator you have but on most calculators you have digit keys to key in numbers, operation keys (multiplication, division, addition, subtraction), function keys (log, exponential, %, square root, square or a power) and you have the = key to obtain the result of the calculation.

Press the [ON] button

To add 2 numbers, exemple 12 and 13
12 [+ key] 13 [= key]. Calculator displays 25, or 25.00 or 25.0000...

To subtract
13 [- key] 7 [=key] . Calculator displays 6 or 6.00, 6.0000....

To multiply
32 [x key] 5 [= key]. Calculator displays 160.

You may have memory keys, to store values. They may be labeled M to enter a number in memory, M+ to add a number to the one already in memory, M- to subtract from the number already in memory.

Hope it gets you started.

Oct 10, 2009 | Canon Office Equipment & Supplies

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