Question

1 - 9 - 7 - 5=??

Answer 1

-20

Answer 2

thanks

Answer 3

Oh, come on, you have to explain it.

Answer 4

here:
add the negative numbers 9+7+5 and you get 21
now we have
1-21
the number we are subtracting is bigger, so the answer is negative
1-21=-20

Answer 5

thanks you!