Question

1º) Calcule o valor das expressões. a) (12+2.5 ) - 8 b) 25- (15+6 : 3 )c) 25+[ 7 + ( 8 - 4 : 2 ) ] d) 60 - [ 8 + (10 - 2) : 2] e) 80 - [ 22 + (5.2 - 1) + 6]f ) 14: 2 + [ 13 - ( 4.2+1) ]

Answer 1

a)
(12+2.5)-8
(12+10)-8
22-8
14

b)
25-(15+6:3)
25-(15+2)
25-17
8

c)
25+[7+(8-4:2)]
25+[7+(8-2)]
25+[7+6]
25+13
38

d)
60-[8+(10-2):2]
60-[8+8:2]
60-[8+4]
60-14
46

e)
80-[22+(5.2-1)+6]
80-[28+(10-1)]
80-[28+9]
80-37
43

f)
14:2+[13-(4.2+1)]
7+[13-(8+1)]
7+[13-9]
7+4
11