Question

What is the value of the expression 3 – a – b when a = 15 and b = –3?

A.
–21

B.
–15

C.
–9

D.
21

Answer 1

3 – a – b
3-15--3
Can be written as
-15+3+3

Answer 2

so?

Answer 3

3+3=?

Answer 4

6

Answer 5

Good now do
-15+6

Answer 6

-21

Answer 7

we are adding 6 to -15

Answer 8

21

Answer 9

21

Answer 10

Ok lets try this

Answer 11

Count.
Count 6 spaces to the right because we are adding

Answer 12

from were?

Answer 13

Start from -15 and since we are adding 6 count 6 spaces to the right

Answer 14

-10

Answer 15

Thats not 6 spaces...