Odpowiedź:
a)
- 3 2/3 +(- 2 1/4) = - 3 8/12 - 2 3/12 = - 5 11/12
b)
3 1/4 - (- 4,5) = 3,25 + 4,5 = 7,75
c)
- 7 1/5 + 2 1/2 = - 7 2/10 + 2 5/10 = - 6 12/10 + 2 5/10 = - 4 7/10
d)
3 1/7 - 5 1/2 = 3 2/14 - 5 7/14 = - 2 5/14
e)
- 2 1/3 - 2 1/2 = - 2 2/6 - 2 3/6 = - 4 5/6
f)
- 6,5 - (- 8 3/4) = - 6,5 + 8,75 = 2,25
g)
5,2 - 8 3/4 = 5,2 - 8,75 = - 3,55
h)
- 2 7/9 + (- 8 5/9) = - 2 7/9 - 8 5/9 = - 10 12/9 = - 11 3/9 = - 11 1/3
i)
- 9 + (- 2 1/2) = - 9 - 2,5 = - 11,5
j)
4 2/3 - (- 3 5/6) = 4 4/6 + 3 5/6 = 7 9/6 = 8 3/6 = 8 1/2
k)
6 1/3 - 9,5 = 6 1/3 - 9 1/2 = 6 2/6 - 9 3/6 = - 3 1/6
l)
- 2 3/4 + 7 1/4 = - 2 3/4 + 6 5/4 = 4 2/4 = 4 1/2
