Adding and Subtracting Integers
15+24
39
-5-(-9)=
4
7 x 5=
35
-10 x (-5)=
50
-7x3=
-21
What is the rule for adding and subtracting integers?
Same signs add and keep, different signs subtract, keep the sign of the further number from zero.
What is the rule for adding and subtracting negative integers?
Subtraction you change the minus to a plus and change the sign of the next number then follow the addition rules (same signs add and keep, different signs subtract, keep the sign of the further number then you'll be exact)
What is the rule for multiplying and dividing integers?
Multiply or divide the numbers then if they have the same sign the answer is positive, if they have different signs the answer is negative.
What is the rule for multiplying and dividing negative integers?
multiply or divide and if same signs the answer is positive. If different signs answer is negative.
What is the rule for multiplying and dividing negative and positive integers at the same time?
The product (x) or quotient (division) of two positive integers or two negative integers is positive. When the signs are different the answer is negative. When the signs are the same the answer is positive.
50-25
25
89-(-34)=
123
54/9=
6
-20/(-5)=
4
-10/5
-2
78+87
165
123-(-75)=
198
50 x 20=
1000
-5x(-7)=
35
-30x20=
-600
80-35
45
276+(-35)=
241
81/9=
9
-12x(-6)=
72
-40/20=
-2