Odpowiedź:
4 i 4/5 -(-6,75) =
= 4 i 8/10 + 6,75 =
= 4,8 + 6,75 =
= 11,55
lub na ułamkach zwykłych
4 i 4/5 -(-6,75) =
= 4 i 8/10 + 6 i 75/100 =
= 4 i 80/100 + 6 i 75/100 =
= 10 i 155/100 =
= 11 i 55/100 =
= 11 i 11/20
(5/7 + 7/5) * 1 i 2/3 =
= (25/35 + 49/35) * 5/3 =
= 74/35 * 5/3 =
= 74/7 * 1/3 =
= 74/21 =
= 3 i 11/21`
1,3 - 3/4 * (-2 i 2/3) =
= 1,3 - 3/4 * (- 8/3)=
= 1,3 - 1/1 * (-2/1)=
= 1,3 - (-2/1)=
= 1,3 + 2 =
= 3,3
(-4 i 2/3) * 1 i 2/7 - 3 i 5/7 =
= - 14/3 * 9/7 - 3 i 5/7=
= - 2/1 * 3/1 - 3 i 5/7 =
= - 6/1 - 3 i 5/7=
= - 6 - 3 i 5/7=
= - 9 i 5/7
5 i 4/7 -(-3 i 1/7)
———————--------— =
(4/15 -(-1/3)):(-1 i 2/5)
""""5 i 4/7 + 3 i 1/7
= ------------------------------- =
"""(4/15 + 1/3) : (- 7/5)
"""" 8 i 5/7
= -------------------------------- =
""""(4/15 + 5/15) * (-5/7)
""" 61/7
= -------------------------- =
"""9/15 * (-5/7)
"""" 61/7
= -------------------- =
"""9/3 * (-1/7)
""" 61/7
= ------------ =
"""- 9/21
= 61/7 : (-9/21) =
= 61/7 * (-21/9) =
= 61/1 * (-3/9) =
= - 183/9 =
= - 20 i 3/9=
= - 20 i 1/3
Szczegółowe wyjaśnienie:
