Question

Os resultados da 15-(3-2)+(7-4)

(10-2)-3+(8+7-5)

18-[2+(7-3-8)-10]

-4+[-3+(-5+9-2)]

Answer 1

a) 15-(3-2)+(7-4)
15-1+3
15-4= 11

b) (10-2)-3+(8+7-5)
8-3+(12-5)
8-3+7
8-10= -2

c) 18-[2+(7-3-8)-10]
18-[2+(-4)-10]
18-[2-4-10]
18-[-12]
18+12= 30

d) -4+[-3+(-5+9-2)]
-4+[-3+2]
-4+[-1]
-4-1 = -5

Answer 2

15-(3-2)+(7-4)
15-1+(7-4)
14+(7-4)
14+3
R:17

(10-2)- 3 + (8+7-5)
8-3+(8+7-5)
5+(8+7-5)
5+(15-5)
5+10
R:15


18- {2+(7-3-8)-10}
18-(2+(4-8)-10)
18-(2+(-4)-10)
18-(2-4-10)
18-(-2-10)
18-(-12)
18+12
R:30

-4+(-3+(-5+9-2))
-4+(-3+(4-2))
-4+(-3+2)
-4+(-1)
-4-1
R: -5