Odpowiedź:
a/
-7⅓+(-4,5) =
- 22/3 ‐ 45/10 =
-220/30 -135/30 =
-85/30 =
-17/6 =
- 2⅚
b/
4,3 - (-6,5) =
4,3 + 6.5 =
10,8
c/
-6/7 × (-2,8) =
-6/7 × (-14/5) =
6 × 2/5 =
12/5 =
2 ⅖
d/
18÷(-2 4/7) =
18÷ (-18/7) =
-18× 7/18 =
-7
