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= 1 · ( 2 5 ) - 0 . ( 2 1 ) + 1 . ( 2 2 )
4 3 4 3 1 5
1. (6-20) - 0 . (6-4) + 1. (10-2)
-14 -0+8 =
-6
B) (0-5) - (12+2) + (-15-0)
-5 - 14 - 15 =
-34
C) 6 · ( 4 5 ) - 2 . ( 4 3 ) + 1 . ( 5 3 )
3 1 3 -2 3 1
6. (4-15) - 2 . (-8-9) + 1. (-10-3)
-66 +34-13 =
-45
D) 0.25 · ( -2 0.5 ) - 2 . ( - 2 3 ) + 0.5 . ( 0.5 3 )
-4 2 -4 1 2 -1
0.25. (-4+2) - 2 . (2+12) + 0.5. (-0.5-6)
-0.5 -28+3.25 =
-31.75 o tambien - 127/ 4
E ) 2 · ( 2 -4 ) - 3 . ( -1 -4 ) + 1 . ( -1 2 )
-2 1 2 1 2 -2
2. (2-8) - 3 . (-1+8) + 1. (2-4)
-12 -21-2 =
-35
F) (0+2) - (-3+1) + (6 - 0)
2+2+6 =
10
G) (-10-12) - (30 + 4) + (18-2 )
-22 - 34 + 16
- 40
H) 0.6 · ( 6 -4 ) - (-2) . ( - 1 -4 ) + 4 . ( -1 6 )
1/3 0.25 0.5 0.25 0.5 1/3
0.6. (1.5 +4/3) - (-2) . (-0.25+2) + 4. (-1/3-3)
- 122/ 15