| a |
4,61 |
−3,08 |
−103 |
7,9 |
301 |
−1 |
| b |
−3,29 |
0,69 |
1 |
−7,9 |
−201 |
74 |
| a+b |
1,32 |
−2,39 |
107 |
0 |
−601 |
−73 |
1) 4,61+(−3,29)=4,61−3,29=1,32;
2) −3,08+0,69=−(3,08−0,69)=−2,39;
3) −103+1=1−103=107;
4) 7,9+(−7,9)=0;
5) 301+(−201)=602−603=−601;
6) −1+74=−(1−74)=−73.