Răspunsuri

2014-09-10T14:25:58+03:00
A)96+40+14=144
b)191
c)...............

Nu stiu sigur daca e bine.
2014-09-10T14:27:49+03:00
A) |-96| + |60-20| + |-14|=96+40+14=
b)
|44:4-4| + |-140| + |-40| + 4=|11-4|+140+40=8+140+40=
c) |-1| + |-2| + |-3| +...+ |-120|=1+2+3+...+120=120*(120+1):2=120*121:2=
in general:
1+2+3+...+n=n*(n+1):2
modulul unui numar sau valoarea absoluta este: