помогите решить примеры ✊

1) -14 + 9 + 14 + (-9)
2) -19 + 18,74 + (-18,7)
3) 42 + (-50) + 13 + (-5)
4) -1,7 + (-3,5) + 5
5) -2,72 + 3,48 + 1,72 + (-7,48)
6) -1,3 + 2,19 + 0,4 + (-2,19)​
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