Calcule o valor das expessoes a)(3+2)x(5-1)+4 b)82-8x7: (4-1x3...

A) (3+2)x(5-1)+4
5x4+4
20+4
24
b) 82-8x7: (4-1x3)
82-8x7: (4-3)
82-8x7: 1
82-56: 1
82-56
26
c) 25-[10-(2x3+1)]
25-[10-(6+1)]
25-[10-7]
25-3
22
d) 70-[12+(5x2-1)+6]
70-[12+(10-1)+6]
70-[12+9+6]
70-[21+6]
70-27
43​