Question

Ma ajutati  ,va rog la aceste exerciti ?!
a)25,3+0,7-21,(83)-16\99=....?
b)2,71-0,8(2)+1,2(5)+1intreg3\5-0.65(4)=.......?
      si..
2la puterea-1=...
(-1.2)la puterea3=....
.......VA rog!....

Answer 1

a)25.3+0.7-21.9830-$\frac{16}{99}$=4
1)25.3+0.7=26
2)-$21\frac{83}{99} - \frac{16}{99}$=-$\frac{2178}{99}$=-22
3)26-22=4

b)2.71-0.8(2)+1.2(5)+$1\frac{3}{5}$-0.65(4)=$\frac{271}{100}- \frac{80}{90} + \frac{120}{90} + \frac{8}{5} - \frac{650}{900}= \frac{2439-800+1200+1120-650}{900} = \frac{3309}{900} =3 \frac{609}{900}$