Question

b- 30+(50+12)-15=

c- 13-8+7-4-2=

d- (60-12-(10+20)-14

Answer 1

B)30+(50+12)-15
30+62-15
92-15
R.Final 77
C)13-8+7-4-2
5+7-4-2
12-4-2
8-2
R.Final 6
D)(60-12-(10+20)-14)
(60-12-30-14)
(48-30-14)
(18-14)
R.Final 4

Answer 2

b

30+(50+12)-15
30+(62)-15
30+47
77

c

13-8+7-4-2
5+7-4-2
12-4-2
8-2
6

d
60-12-(10+20)-14
48-(10+20)-14
48-(30)-14
18-14
4

Espero ter ajudado