Operations with integers
By: Marifer Aguilar and Roberto
Adding integers
2. Add the numbers
3. The result takes the sign of the integer with the greater absolute value.
Images of Adding, Subtracting and Multiplying Integers
Adding Integers 1) -8 + 8= 0 because negative sign and positive sign it is subtraction so you subtract and it is 0. 2) -9 + -11= -20 First you look at the signs and positive and negative sign becomes a negative sign so now we have -9 -11 but negative and negative becomes positive so you add 11+9= 20 and you put a negative sign to the 20 because 11 is the greater absolute vale and it is negative. 3) -12 + 10= -2 First you look at the signs so negative and positive is a negative sign so you subtract 12-10=2 and you put a negative sign because 12 is the greater absolute value and it is negative. | Subtracting integers 1) 4- (-1)=5 First you look at the signs and negative sign and negative sign = positive sign so you add 4+1=5 2) 6- -12= -18 First you see the sign and negative and negative= positive sign so you add 6 + 12= 18 but 12 is the greater absolute value so you put the negative sign that the number had. 3) 3 - (-5) = 8 First you look at the sign and negative and negative= positve sign so you add 3+5=8 | Multiplying Integers 1) -2x2= -4 First you multiply 2x2= 4 and then you put the negative sign of 2 because it is the biggest absolute value so it is -4 2) 2x3= 6 You only multiply 2x3 because it is positive. 3) -7x-3= You multiply 7x3= 21 and then you look at the sign but negative and negative is a positive sign so you leave it as 21. |
Adding Integers
2) -9 + -11= -20 First you look at the signs and positive and negative sign becomes a negative sign so now we have -9 -11 but negative and negative becomes positive so you add 11+9= 20 and you put a negative sign to the 20 because 11 is the greater absolute vale and it is negative.
3) -12 + 10= -2 First you look at the signs so negative and positive is a negative sign so you subtract 12-10=2 and you put a negative sign because 12 is the greater absolute value and it is negative.
Subtracting integers
2) 6- -12= -18 First you see the sign and negative and negative= positive sign so you add 6 + 12= 18 but 12 is the greater absolute value so you put the negative sign that the number had.
3) 3 - (-5) = 8 First you look at the sign and negative and negative= positve sign so you add 3+5=8
Multiplying Integers
2) 2x3= 6 You only multiply 2x3 because it is positive.
3) -7x-3= You multiply 7x3= 21 and then you look at the sign but negative and negative is a positive sign so you leave it as 21.
More about Integers
Examples of Dividing Integers
2) -8÷ -2 you divide 8÷2 which is 4 and the numbers have negative and negative which is positive sign so it stays in 4.
3) -15÷-3 you divide 15÷3 which is 5 and then tou look at the sign so negative and negative = positive signs so you leave the answer in 5
Bibliography
N.d. Web. <http://www.virtualnerd.com/images/Tutorial/PreAlg_01_01_0004-diagram_thumb-lg.png>.
Picture of Subtracting integers
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Picture of multiplying Integers
N.d. Web. <http://www.passyworld.com/passyImagesTwelve/MultQfour500x363GIF.gif>.
Picture of dividing integers
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Picture of subtracting integers
Picture of Multiplying integers
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