Question

1) calcule o valor da expressão a) 10-1+8-4 b)25 -(10 -1 -3) c)23 --(2 +8) -7 d)10 +5-6-3-3+1 e)75 -10 -8 +5 -1 f)(3+2) x(5-1) +4​

Answer 1

a) 10 - 1 + 8 - 4 = 9 + 4 = 13

b) 25 - ( 10 - 1 - 3) = 25 - 6 = 19

c) 23 - ( 2 + 8) - 7 = 23 - 10 - 7 = 13 - 7 = 6

d) 10 + 5 - 6 - 3 - 3 + 1 = 15 - 6 + 1 = 9 + 1 = 10

e) 75 - 10 - 8 + 5 - 1 = 65 - 8 + 4 = 61

f) ( 3 + 2) x ( 5 - 1) + 4 = 5 x 4 + 4 = 20 + 4 = 24