15. 49, 39, 32, -23, -33, -49
16. - 64
17. 28 x (-5) : (-4)
= -140 : (-4)
= 35
18. 2,5 x 7/50 + 61%
= 17,5/50 + 61/100
= 96/100 96% 0,96
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15. 49, 39, 32, -23, -33, -49
16. - 64
17. 28 x (-5) : (-4)
= -140 : (-4)
= 35
18. 2,5 x 7/50 + 61%
= 17,5/50 + 61/100
= 96/100 96% 0,96