Question

50道有理数加法

Answer 1

1+-2

2+-9

3+-4

2-2-2-2+2-2

2-2-2+6

1-1

2-1+21

212-12

1+-21

2-1+3

12+-6

1+1-2

1+7234

2+-24

2-+4

20+-45

524-+2

4141+2

412+1

21+24

2742

75-2+4

4+923

524+9

242+-4

2412+-4

241+-2

72-+4

24129+4

2+5

21-+2

44-+7-+72

44-+

24-42+