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= 3/4-6/4+(2 4/8-1 7/8)*8-9/4=
=3/4-6/4+(20/8-15/8)*8-9/4=
=-3/4+(5/8)*8-9/4=
=-3/4+5-9/4=
=-3/4+20/4-9/4=
=17/4-9/4=
=8/4=2
pozdrawiam
dagmara
¾ - 6/4 + (2 4/8 - 1 7/8) * 8 - 2 ¼ =
-¾ + (20/8 - 15/8) * 8 - 2 ¼ =
-¾ + 5/8 * 8 - 2 ¼ =
-3 + 5 = 2
3/4 - 6/4 + 20-15 - 9/4 = 5-12/4=5-3=2