Addition of signs: Examples: a + b • If a and b is both have the same signs, then the sum is also carries that sign. • If the absolute value of a is greater than b and a is negative then the sum would be negative. Eg: -8 + 4 = -4 • If the absolute value of a is greater than b but b is negative, then the sum is positive. Eg: 10 + -9 = 1
Subtraction of signs: • If both a and b have same signs, then b would be multiplied by -1 and change the operation to addition. Eg: +2 - +4 = 2 + -1(4) = 2 - 4 = -2 • If the signs of a and b are different, still, apply the same procedure, multiply the subtrahend with negative 1, then change operation to addition. Eg: 5 - (-5) = 5 + -1(-5) = 5 + 5 = 10
Multiplication of signs: • If both a and b have the same signs, then the product would be POSITIVE. Eg: -6 • -5 = 30; 7 • 3 = 21 • If a and b have different signs, then the product would be negative! Eg: -2 • 3 = -6
Division of signs: • If a and b have the same signs, then the quotient would be Positive! Eg: -8/-2 = 4; 10/5 = 2 • If a and b have different signs, then the quotient would be negative! Eg: 12 / -3 = -4; -9 / 3 = -3
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Augustegrey
ADDITION: For LIKE SIGNS, add and copy the common sign. (+) + (+) = + (-) + (-) = - For UNLIKE SIGNS, subtract and copy the sign of the number with greater value. Ex. 5 + (-6) = -1 [Regardless of the sign, subtract the number with smaller value (5) from the larger number (6), so that, 6-5=1. Since the sign of the number with the greater absolute value, in this case, is |-6| = 6, then the answer -1. ]
SUBTRACTION: General Rule: Change the sign of the subtrahend (the second number), and proceed to the rule in ADDITION.
MULTIPLICATION & DIVISION The product/quotient of LIKE SIGNS is always positive Ex. multiplication (10)(5) = 50 (-10)(-5) = 50 (10)(-5) = -50 (-10)(5) = -50
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Addition of signs:Examples: a + b
• If a and b is both have the same signs, then the sum is also carries that sign.
• If the absolute value of a is greater than b and a is negative then the sum would be negative.
Eg: -8 + 4 = -4
• If the absolute value of a is greater than b but b is negative, then the sum is positive.
Eg: 10 + -9 = 1
Subtraction of signs:
• If both a and b have same signs, then b would be multiplied by -1 and change the operation to addition.
Eg: +2 - +4 = 2 + -1(4) = 2 - 4 = -2
• If the signs of a and b are different, still, apply the same procedure, multiply the subtrahend with negative 1, then change operation to addition.
Eg: 5 - (-5) = 5 + -1(-5) = 5 + 5 = 10
Multiplication of signs:
• If both a and b have the same signs, then the product would be POSITIVE.
Eg: -6 • -5 = 30; 7 • 3 = 21
• If a and b have different signs, then the product would be negative!
Eg: -2 • 3 = -6
Division of signs:
• If a and b have the same signs, then the quotient would be Positive!
Eg: -8/-2 = 4; 10/5 = 2
• If a and b have different signs, then the quotient would be negative!
Eg: 12 / -3 = -4; -9 / 3 = -3
For LIKE SIGNS, add and copy the common sign.
(+) + (+) = +
(-) + (-) = -
For UNLIKE SIGNS, subtract and copy the sign of the number with greater value.
Ex. 5 + (-6) = -1
[Regardless of the sign, subtract the number with smaller value (5) from the larger number (6), so that, 6-5=1. Since the sign of the number with the greater absolute value, in this case, is |-6| = 6, then the answer -1. ]
SUBTRACTION:
General Rule: Change the sign of the subtrahend (the second number), and proceed to the rule in ADDITION.
MULTIPLICATION & DIVISION
The product/quotient of LIKE SIGNS is always positive
Ex.
multiplication
(10)(5) = 50
(-10)(-5) = 50
(10)(-5) = -50
(-10)(5) = -50
division
(10)/(5) = 2
(-10)/(-5) = 2
(10)/(-5) = -2
(-10)/(5) = -2