Răspuns :
1)1999=1122+2000-546 1999=3122-546 1999=2576 nu este adevarata egalitatea 3)999999999+79034-869954÷2+(a-827) 999999999+79034-434977+(a-827) 999644056+a-827 a=999644056-827 a=999643229 4)23*4=92