Odpowiedź:
Szczegółowe wyjaśnienie:
d)
1 1/3 * 0,5 = (3/3 + 1/3) * 5/10 = 4/3 * 1/2 = 4*1/3*2 = 2/3
f)
- 1,5 : (-2 1/3) = - 3/2 : (- 6/3 - 1/3) = - 3/2 : (-7/3) =
= 3/2 * 3/7 = 9/14
g)
- 1 3/4 + 7 1/5 = - 4/4 - 3/4 + 35/5 + 1/5 =
= - 7/4 + 36/5 = - 35/20 + 144/20 = 109/20 =
= 100/20 + 9/20 = 5 + 9/20 = 5 9/20
j)
- 13,1 - 2,5 = - 131/10 - 25/10 = - 156/10 = - 150/10 - 6/10 =
= - 15 - 3/5 = - 15 3/5
k)
17,21 - 20,03 = 1721/100 - 2003/100 = - 282/100 =
= - 200/100 - 82/100 = - 2 - 41/50 = - 2 41/50
