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b)
2.
11 : (-5,5) + (-14) * 0,5= -2 + (-7)= -9
a)
3. 1 1/5 * 2,5 - 3,5 :1,4= 6/5 * 5/2 - 7/2 : 7/5 = 30/10 - 5/2 = 3-2 1/2= 0,5
-2+-7=-9
3-2,5=0,5