Question

Найдите сумму:
1. -4 +(-5) = -9;
2. 9 +(-11) = 2;
3. -10 + 4 = -14;
4. -6 +(-3) = 9;
5. -7 + 7 =0;
6. 13 +(-7) = -6;
7. 14 +(-15) = -1;
8. 13 +(-16) = 3;
9. 0 +(-3) = -3;
10. -11 + 17 = -6.
11. (+7)+(+5)
12. (+10)+(-8)
13. (-12)+(+8)
14. (-7)+(-3)
15. (-8)+(+8)
16. (+9)+0
17. 0+(-12)
Вставить пропущенное число:
1. -7 + * = -4;
2. -7 + * = -10;
3. 7 + * = 4;
4. * + 8 = -1;
5. * + (-8) = -17;
6. * + (-8) = 1.

Answer 1

1. -4 +(-5) = -9;
2. 9 +(-11) = -2;
3. -10 + 4 = -6;
4. -6 +(-3) = -9;
5. -7 + 7 =0;
6. 13 +(-7) = 6;
7. 14 +(-15) = -1;
8. 13 +(-16) = -3;
9. 0 +(-3) = -3;
10. -11 + 17 = 6.
11. (+7)+(+5)= 12
12. (+10)+(-8)= 2
13. (-12)+(+8) =-4
14. (-7)+(-3) = -10
15. (-8)+(+8) = 0
16. (+9)+0 = 9
17. 0+(-12) = -12
Вставить пропущенное число:
1. -7 + 3 = -4; 
2. -7 + (-3) = -10;
3. 7 + (-3) = 4;
4. -9 + 8 = -1;
5. -9 + (-8) = -17;
6. 9 + (-8) = 1.