Odpowiedź:
a)
(1/4 + 3/8) * 3=
= (2/8 + 3/8) * 3=
= 5/8 * 3=
= 15/8 = 1 i 7/8
b)
2/15 * 7 - 1/3 =
= 14/15 - 5/15=
= 9/15
c)
(2/3 - 5/12) * 7 =
= (8/12 - 5/12) * 7=
= 3/12 * 7=
= 21/12 =
= 1 i 9/12
d)
5/6 * 7 - 3/8 * 3=
= 35/6 - 9/8 =
= 5 i 5/6 - 1 i 1/8=
= 5 i 20/24 - 1 i 3/24=
= 4 i 17/24
e)
(4 * 3/8 + 1/16) * 2=
= (1 * 3/2 + 1/16) * 2=
=(24/16 + 1/16) * 2=
= 25/16 * 2=
= 25/8 * 1=
= 25/8 =
= 3 i 1/8
f)
2(3/5 - 1/7) + 1/5=
= 2(21/35 - 5/35) + 1/5=
= 2*16/35 + 7/35=
= 32/35 + 7/35=
= 39/35=
= 1 i 4/35
g)
1 i 1/6 * 7 - 5/9 * 3=
= 7/6 * 7 - 5/3 * 1=
= 49/6 - 5/3=
= 49/6 - 10/6 =
= 39/6 =
= 6 i 3/6 =
= 6 i 1/2
h)
(1 i 1/6 * 5 - 1/3) * 5=
= (7/6 * 5 - 2/6) * 5=
= (35/6 - 2/6) * 5=
= 33/6 * 5 =
= 165/6 =
= 27 i 3/6 =
= 27 i 1/2
Szczegółowe wyjaśnienie:
