Question

20-(9+1-3)-(7-4)-(5+4)=?

Answer 1

20-(9+1-3)-(7-4)-(5+4)=1 
20-9-1+3-7+4-5-4=1

Answer 2

Первым действием 9+1+3=13
вторым 7-4=3
третьим 5+4=9
четвертым 20-13=7
пятым 7-3=4
шестым 4-9=-5

Answer 3

Let's simplify the expression using the order of operations (PEMDAS):

20 - (9 + 1 - 3) - (7 - 4) - (5 + 4)

= 20 - (9 + 1 - 3) - 3 - 9

= 20 - 7 - 3 - 9

= 1

Therefore, the value of the expression is 1.