Odpowiedź:
licze na naj:)
Szczegółowe wyjaśnienie:
a) 1 5/8 - (2,75 - 1 4/5) = 13/8 - (11/4 - 9/5) = 13/8 - 19/20 = 27/40
-4,8 - (2 5/6 + 7 2/3) = -24/5 - ((2+7) + (5/6 + 2/3)) = -24/5 - (9 + 3/2) = -24/5 - (9 + 1 1/2) = -24/5 - 10 1/2 = -24/5 - 21/2 = -48/10 - 105/10 = -153/10
b) 1,35 - (2 3/4 - 3 1/8) = 27/20 - (11/4 - 25/8) = 27/20 - (-3/8) = 27/20 + 3/8 = 54/40 + 15/40 = 69/40
-7 1/2 - (-6 3/5 + 2,3) = -15/2 - (-33/5 + 23/10) = -15/2 - (-43/10) = -15/2 + 43/10 = -75/10 + 43/10 = -32/10 = -16/5
