Odpowiedzi

2009-09-15T16:43:41+02:00
A) 100*2100=210000
b) -40 000*22=-880000
c)615+524-139=1000
2009-09-15T16:48:26+02:00
4x(-70)x(-25)x30 = -280x(-25)x30 = 7000x30 = 210000

(-2)×(-40)×(-500)×22= 80x(-500)x22 = -40000x22 = -880000


(-24)+639+524+(-139)= 615+524+(-139) = 1139 + (-139) = 1000
2009-09-15T17:05:41+02:00
-28×-750=- 21000
80×-11000=880000
(-24)+639+524-139=1163-163=1000
Prosze oto rozwiązania.