Question

7 - -9 how to subtract a positive and negetive number

Answer 1

Answer:

7- -9

7-(-9)=7+9=16

then answer is 16

Answer 2

Step-by-step explanation: It is written as 7 - (-9) and spelled as "Seven minus of minus nine"

Remember, if there are 2 signs of same power (either positive or negative) then it will do the opposite sign's work.

Now in this question there are 2 signs of minus so it will do the work of opposite (+) that is plus sign.

So 7 - (-9) = 7 + 9 = 16