Răspuns:
Ex 1:
48 = XLVIII
56 = LVI
1982 = MCMXXXII
1974 = MCMLXXIV
Ex 2:
= {7+7[7+3(5+15-15)]}-161
= [7+7(7+3•5)]-161
= [7+7(7+15)]-161
= (7+7•22)-161
= (7+154)-161
= 161-161
= 0
Ex 3:
a:xy = 27 rest 98
a = xy •27+98 → xy = 99
a = 99•27+98
a = 2673+98
a = 2771
Ex 4:
= 2^48:(2^15)³-2-1
= 2^48:2^45-2-1
= 2³-2-1
= 8-2-1
= 5
Ex 5:
4^29 = (2^2)^29 = 2^58
2^53 < 2^58
2^30 = (2³)^10 = 8^10
3^20 = (3²)^10 = 9^10
2^30 < 3^20
Ex 6:
D 12 = {1,2,3,4,6,12}
D 28 = {1,2,4,7,14,28}
Divizori comuni:{1,2,4}
Ex 7:
12 robinete → 2h
6 robinete → x h
12/6 = x/2
2 = x/2
x = 2•2
x = 4 ore
Ex 8:
339:3-2 = 113-2 = 111
ab = 111
ba = 111-3 = 108
La astea am putut sa te ajut.
EVERGREEN
