Question

Calcule:
01) 12 [ -13 + 4 ( 1- (1/3) - 1 ]
02) 7/5 (1/2+ 4/9) -1

Answer 1

1) 12 [ - 13 + 4 + 2/3 - 1]
12 [ - 9 + 2/3 - 1]
12 [ - 27/3 + 2/3 - 1]
12 [- 25/3 - 1]
12 [ - 25/3 - 3/3]
12 . (-28/3)
- 112

2) 7/5 (9/18 + 8/18) -1
7/5 . 17/18 - 1
119/90 - 1
119/90 - 90/90
29/90