Odpowiedź:
Mam nadzieję że pomogłam :)
a)
3 * (1/3 + 1/4) = 3 * (4/12 + 3/12) = 3 * 7/12 = 7/4 = 1 3/4
b)
(2 - 1/3) : (1/2 + 1/3) = 1 2/3 : (3/6 + 2/6) = 5/3 : 5/6 = 5/3 * 6/5 = 2
c)
(2 2/7 - 1/5) * 5 + 4/7 = (2 10/35 - 7/35) * 5 + 4/7 = 2 3/35 * 5 + 4/7 =
= 73/35 * 5 + 4/7 = 73/7 + 4/7 = 10 3/7 + 4/7 = 10 7/7 = 11
d)
(1/2 + 2/3) : (2/3 + 1/2) = 1 bo to sa te same wyrazy
e)
(1/2 + 2/3) : 2/3 + 1/2 = (3/6 + 4/6) * 3/2 + 1/2 = 7/6 * 3/2 + 1/2 =
= 7/2 * 1/2 + 1/2 = 7/4 + 2/4 = 9/4 = 2 1/4
f)
1/2 + 2/3 : 2/3 + 1/2 = 1 + 1 = 2
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Odpowiedź:
Mam nadzieję że pomogłam :)
Odpowiedź:
a)
3 * (1/3 + 1/4) = 3 * (4/12 + 3/12) = 3 * 7/12 = 7/4 = 1 3/4
b)
(2 - 1/3) : (1/2 + 1/3) = 1 2/3 : (3/6 + 2/6) = 5/3 : 5/6 = 5/3 * 6/5 = 2
c)
(2 2/7 - 1/5) * 5 + 4/7 = (2 10/35 - 7/35) * 5 + 4/7 = 2 3/35 * 5 + 4/7 =
= 73/35 * 5 + 4/7 = 73/7 + 4/7 = 10 3/7 + 4/7 = 10 7/7 = 11
d)
(1/2 + 2/3) : (2/3 + 1/2) = 1 bo to sa te same wyrazy
e)
(1/2 + 2/3) : 2/3 + 1/2 = (3/6 + 4/6) * 3/2 + 1/2 = 7/6 * 3/2 + 1/2 =
= 7/2 * 1/2 + 1/2 = 7/4 + 2/4 = 9/4 = 2 1/4
f)
1/2 + 2/3 : 2/3 + 1/2 = 1 + 1 = 2
Szczegółowe wyjaśnienie: