WHOLE NUMBERS (Continued)
The product or quotient of two numbers with different signs is always negative:
A lone negative sign in front of parenthesis means you change the signs of any number inside them. A positive sign in front of a parenthesis doesn't change anything. Thus, it is rarely written. Look at these examples:
For example, it is always a good idea to place negative numbers inside parentheses when we have to perform an operation with them:
Solve the following exercises:
Solve the following exercises:
a) 3+4-6-7x2-13 = -26
b) 4-10-6/2-5+8 = -6
c) 2+4-5+6(-9)-20 = -73
d) 2(-3-2)+1-4(1-3)-6 = -7
e) 17-(5-1)-2(-4-1)+10 = 33
f) 2[-3-2(3+1)+2] = -18
g) 1+[2-4(2-4)-8] = 3
In case you've had any difficulties:
a) –6–14–13 =– 26
b) –6–3–5+8 = –6
c) 1–54–20 = –73
d) 2(-5)+1-4(-2)-6 = -10+1+8-6 = -7
e) 17-4-2(-5)+10 = 13+10+10 = 33
f) 2[-3-2 4+2] = 2[-3-8+2] = 2 (-9) = -18
g) 1+[2-4 (-2)-8] = 1+[2+8-8] = 1+2 = 3
