Odpowiedzi

2010-02-22T18:59:39+01:00
A)105+(-7)+(-13)+20=105+(-20)+20=105
b)-16+67+(-10)+(-7)+66=[(-16)+66]+[67+(-17)]=50+50=100
2010-02-22T19:02:00+01:00
A) 105+(-7)+(-13)+20= 98+7=105
b) -16+67+(-10)+(-7)+66= 51+(-17)+66=34+66=100
2010-02-22T19:03:30+01:00
A) 105 + (-7) + (-13) + 20 = 105 + 20 + (-7) + (-13) = 125 - 20 = 105
b) -16 + 67 + (-10) + (-7) + 66 = 66 - 16 + 67 - 7 - 10 = 50 + 60 - 10 = 100