Question

find the difference
3-(-9)

Answer 1

-(-a) = a

Answer 2

can someone help me

Answer 3

-(-a) = a
-(-9) = 9

Answer 4

3 - (-9) = 3 + 9

Answer 5

o thx u wanna help me with more

Answer 6

Sure. Start a new post, I'll help you there.

Answer 7

To subtract numbers, change the subtraction into an addition, then follow the rules of addition. To change a subtraction into an addition, change minus into plus and change the sign of the second number.

Example 1:
-3 - (-5) = -3 + 5 = 2

Example 2:
23 - 28 = 23 + (-28) = -5

Answer 8

i did