Welcome to Bucaro TecHelp!

Bucaro TecHelp
Maintain Your Computer and Use it More Effectively
to Design a Web Site and Make Money on the Web

About Bucaro TecHelp About BTH User Agreement User Agreement Privacy Policy Privacy Site Map Site Map Contact Bucaro TecHelp Contact RSS News Feeds News Feeds

Victims of Sandy Hook

Stop the Slaughter of Innocents. Congress is bought and paid for by gun lunatics and gun promotion groups. If you want to live in a safe America, help buy Congress back for America. Send a donation to Mayors Against Illegal Guns, 909 Third Avenue, 15th Floor New York, NY 10022

Working With Signed Numbers

Working with signed numbers is easy, it requires only a few easy rules. But if you don't work with signed numbers every day, you could easily forget the rules.

Rules for Adding Signed Numbers

If one of the numbers is zero - Any number plus zero is that number.
If both numbers are positive - Add the numbers, the sum is positive.
If both numbers are negative - Add the numbbers, the sum is negative.
If one number is positive and One is negative - Subtract the smaller number from the larger number.

The sign of the answer, called the sum, is the sign of the largest absolute value number. Absolute value means the number without the sign.)

If a number is positive, we usually leave out the sign, and +0 and -0 are both the same thing, just 0 (zero).

Examples

46 + 0 = 46Any number plus zero is that number
27 + 46 = 73Both numbers are positive - Add the numbers, the sum is positive.
-27 + (-46) = -73Both numbers are negative - Add the numbbers, the sum is negative.
27 + (-46) = -19One number is positive and one is negative - Subtract the smaller number from the larger number. Here -46 is the largest number.
-27 + 46 = 19One number is positive and one is negative. Here 46 (+46) is the largest number.

Rule for Subtracting Signed Numbers

Change the sign of the number being subtracted, then add using the rules for adding signed numbers.

Examples

46 - 0 = 46 - (+0) = 46Whether you add zero, to or subtract zero from a number, the answer is always that number.
0 - 46 = 0 + (-46) = -46One number is positive and one is negative - Subtract the smaller number from the larger number. Here -46 is the largest number.
27 - 46 = 27 + (-46) = -19One number is positive and one is negative. The sign of the sum is the sign of the largest (absolute value) number. Here -46 is the largest number.
46 - 27 = 46 + (-27) = 19One number is positive and one is negative. The sign of the sum is the sign of the largest (absolute value) number. Here 46 (+46) is the largest number.

The subtrahend is the second number in a subtraction, the number to be subtracted. The first number in a subtraction, the minuend is the number from which the subtrahend is to be subtracted.

Multiplying Signed Numbers

If one of the numbers is zero - The answer is always zero.
If both numbers have the same sign - Multiply the numbers, the answer is always positive.
If the Numbers have different signs - Multiply the numbers, the answer is always negative.

Examples

12(0) = 0If one of the numbers is zero - The answer is always zero.
0(-9) = 0If one of the numbers is zero - The answer is always zero.
8(4) = 32If both numbers have the same sign - Multiply the numbers, the answer is always positive.
(-8)(-4) = 32If both numbers have the same sign - Multiply the numbers, the answer is always positive.
12(-4) = -48If the Numbers have different signs - Multiply the numbers, the answer is always negative.
(-3)10 = -30If the Numbers have different signs - Multiply the numbers, the answer is always negative.

The multiplicand is a number that is to be multiplied by another number (the multiplier). The multiplier is the number of times the multiplicand gets multiplied. It doesn't matter which comes first, the result, the product is the same either way.

RSS Feed RSS Feed

Follow Stephen Bucaro Follow @Stephen Bucaro

Fire HD
[Site User Agreement] [Privacy Policy] [Site map] [Search This Site] [Contact Form]
Copyright©2001-2017 Bucaro TecHelp 13771 N Fountain Hills Blvd Suite 114-248 Fountain Hills, AZ 85268