Question

Exercise 1: When the numbers have the same sign (positive or negative) add them and retain the sign.
Evaluate without using a calculator.
a) 3+ 4 = (+3) + (+4) =
b) 3+ 4+ 5 = (+3) + (+4) + (+5) =
c) -2 -9 = (-2) + (-9) =
d) -2 - 9 - 11 = (-2) + (-9) + (-11) =

Answer 1

Answer:

a +7

b +12

c -11

d -22

so simple

Answer 2

Answer:

3+4 = 7

3+4+5= 12

-2-9= -11

-2-9-11= -22