Oblicz, korzystając z praw przemienności i łączności dodawania.24+56+13, 32+38+53, 55+23+47,23+48+22, 57+35+25,28+44+72
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24+56+13=93
32+38+53=123
55+23+47=125
23+48+22=93
57+35+25=117
28+44+72=144
24+56+13 = 93
32+38+53 = 123
55+23+47 = 135
23+48+22 = 103
57+35+25 = 117
28+44+72 = 144
24+56+13=najprosciej 24 plus 56=80 plus 13=93
32+38+53=70plus53=123
55+23+47=55 plus70=125
23+48+22=23 plus 70=93
57+35+25=57 plus60=117
28+44+72=100 lus44=144