4 + 5 - 3 + 1 =

(a)  

6 - 1 + 2 - 7

(a)  

2 + 5 + 1 - 5 =

(a)  

3 - 2 + 5 + 3 =

(a)  

7 - 5 + 1 - 2 =

(a)  

9 - 3 - 1 + 1 =

(a)  

1 + 2 + 5 - 3 =

(a)  

2 + 5 + 1 - 5 =

(a)  

8 - 3 + 4 - 4 =

(a)  

5 + 4 - 2 + 1 =

(a)  

2 + 6 + 1 - 9 =

(a)  

7 - 5 + 6 + 1 =

(a)  

1 + 3 - 2 + 5 =

(a)  

2 - 1 + 8 - 4 =

(a)  

8 + 1 - 9 + 2 =

(a)  

6 + 3 - 5 - 3 =

(a)  

9 - 8 + 2 + 1 =

(a)  

3 + 1 - 4 + 6 =

(a)  

4 + 5 - 3 - 5 =

(a)  

20 + 10 - 30 + 50 =

(a)  

60 + 10 + 20 - 50 =

(a)  

30 + 60 - 90 + 20

(a)  

50 + 10 + 30 - 80 =

(a)  

10 + 60 - 50 + 70 =

(a)  

90 - 40 + 30 - 80 =

(a)  

40 + 50 - 60 + 10 =

(a)  

10 + 70 + 10 - 60 =

(a)  

40 - 20 + 50 + 10 =

(a)  

50 + 30 + 10 - 10 =

(a)  

6 + 2 - 5 + 1 - 4 =

(a)  

7 - 5 + 6 + 1 - 7 =

(a)  

3 + 1 - 4 + 5 + 2 =

(a)  

8 - 7 + 3 + 5 - 3 =

(a)  

2 + 6 + 1 - 8 + 3 =

(a)  

9 - 7 + 2 + 5 - 6 =

(a)  

2 + 1 + 5 + 1 - 1 =

(a)  

3 - 2 + 3 - 4 + 5 =

(a)  

5 + 4 - 8 + 7 + 1 =

(a)  

9 - 8 + 2 + 1 - 3 =

(a)  

70 - 50 + 20 - 40 + 30 =

(a)  

10 + 20 + 10 - 30 + 70 =

(a)  

90 - 40 + 20 + 10 - 60 =

(a)  

30 + 50 - 70 + 20 + 10 =

(a)  

60 - 10 + 40 - 80 + 50 =

(a)  

70 + 20 - 90 + 30 + 60 =

(a)  

50 + 40 - 60 + 10 - 30 =

(a)  

20 + 70 - 10 - 50 + 10 =

(a)  

80 - 80 + 20 + 20 + 50 =

(a)  

10 + 50 - 60 + 70 - 50 =

(a)  

4 - 3 + 5 + 2 + 1 =

(a)  

7 + 2 - 9 + 6 - 5 =

(a)  

8 - 7 + 1 + 2 - 4 =

(a)  

3 + 5 - 2 + 3 - 9 =

(a)  

5 + 4 - 8 + 2 + 1 =

(a)  

20 + 20 + 50 - 10 - 30

(a)  

40 - 30 + 20 + 50 + 10 =

(a)  

60 + 20 + 10 - 90 + 70 =

(a)  

50 + 10 - 60 + 10 + 60 =

(a)  

10 + 80 - 50 - 30 + 20 =

(a)  

9 - 8 + 3 - 4 + 3 + 1 =

(a)  

5 + 2 - 7 + 6 + 3 - 8 =

(a)  

7 - 6 + 5 + 3 - 4 + 1 =

(a)  

8 + 1 - 9 + 4 - 3 + 2 =

(a)  

3 - 3 + 5 + 2 + 2 - 9 =

(a)  

8 - 7 + 3 + 5 - 8 + 7 =

(a)  

2 + 6 - 8 + 9 - 3 + 1 =

(a)  

6 - 5 + 2 + 1 + 5 - 7 =

(a)  

2 + 1 + 6 - 5 - 3 + 8 =

(a)  

1 + 2 + 1 - 4 + 7 - 2 =

(a)  

30 + 60 - 80 + 10 - 20 + 50 =

(a)  

70 + 10 + 10 - 90 + 30 + 60 =

(a)  

30 - 30 + 20 + 50 - 70 + 40 =

(a)  

50 + 10 + 30 - 80 + 30 - 20 =

(a)  

90 - 80 + 30 - 10 + 50 - 50 =

(a)  

40 + 50 - 20 - 10 - 50 + 60 =

(a)  

70 - 70 + 60 + 20 - 80 + 10 =

(a)  

10 + 30 - 40 + 50 + 20 + 10 =

(a)  

90 - 50 - 30 - 10 + 20 + 50 =

(a)  

60 + 30 - 40 + 10 - 50 + 30 =

(a)  

3 + 1 + 5 - 6 + 1 - 4 + 7 =

(a)  

8 - 3 + 2 - 7 + 6 + 2 - 5 =

(a)  

7 + 2 - 9 + 8 + 1 - 6 + 5 =

(a)  

1 + 3 - 2 + 5 - 6 + 8 - 9 =

(a)  

5 + 2 + 1 + 1 - 9 + 2 + 2 =

(a)  

6 - 6 + 4 - 3 + 8 - 1 - 3 =

(a)  

2 + 2 - 3 + 7 - 6 + 5 + 2 =

(a)  

9 - 3 - 5 + 7 - 6 + 5 + 2 =

(a)  

6 + 1 + 2 - 8 + 2 + 5 + 1 =

(a)  

4 - 3 + 2 + 6 - 7 + 6 - 5 =

(a)  

40 - 20 + 50 + 20 - 70 + 10 - 30 =

(a)  

60 + 10 - 70 + 30 + 60 - 50 - 10 =

(a)  

80 - 70 + 20 + 50 - 60 + 10 + 50 =

(a)  

30 + 10 - 20 + 60 + 10 - 40 + 10 =

(a)  

50 + 30 - 70 + 20 - 30 + 40 - 30

(a)  

70 - 60 + 20 + 10 - 40 + 30 + 50

(a)  

30 + 60 - 30 - 50 + 10 + 20 + 50 =

(a)  

10 + 50 + 20 - 70 + 30 - 20 + 50 =

(a)  

90 - 50 - 40 + 20 + 70 - 10 - 20 =

(a)  

40 - 10 + 50 + 10 - 40 + 20 + 10 =

(a)