Oblicz jak najprostrzym sposobem : rozpisując a) 105+(-7)+(-13)+20 = b) -16+67+(-10)+(-7)+66=
a.) 105+(-7)+(-13)+20= 105-7-13+20=105
b.) -16+67+(-10)+(-7)+66= -16+67-10-7+66=100
a) 105+(-7)+(-13)+20 = 105 + (-20) + 20 = 105
b) -16+67+(-10)+(-7)+66= 67 + 66 + (-16) + (-17) = 67 + 50 + (-17) = 50 + 50 = 100
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a.) 105+(-7)+(-13)+20= 105-7-13+20=105
b.) -16+67+(-10)+(-7)+66= -16+67-10-7+66=100
a) 105+(-7)+(-13)+20 = 105 + (-20) + 20 = 105
b) -16+67+(-10)+(-7)+66= 67 + 66 + (-16) + (-17) = 67 + 50 + (-17) = 50 + 50 = 100