Question

Va rog ajutor am mai cerut dar nu mai gasesc postarea
1) 3/10 ori 29/9 : 14/30
2) 1/2 : 4/3 + 6/5
3) 5/2 - 1/3 : 1/5
4) 1/5 + 2/5 : 1/5 - 1/5
Dau coroana

Answer 1

1)
3/10 × 29/9 : 14/30=
=1×29 totul supra/10×3 :14/30=
=29/30 :14/30=
=29/30×30/14=
=29×1 totul supra/1×14=
=29/14

2)
1/2 : 4/3 + 6/5=
=1/2 × 4/3 + 6/5=
=1×2 totul supra/1×3 + 6/5=
=2/3 + 6/5=
=5×2+3×6 tot ăsta supra/15=
=10+18 totul supra/15=
=28/15

3)
2/5 - 1/3 : 1/5=
=2/5 - 1/3 ×5/1 =
=2/5- 1×5 totul supra/3×1 =
=2/5 - 5/3 =
=3×2-5×5 totul supra/15=
=6-25 totul supra /15=
= (-19)/15

Ai scris corect exercitiu acesta?

4)
1/5 + 2/5 : 1/5 - 1/5=
=1/5 + 2/5× 5/1 -1/5=
=1/5 + 2×1 totul supra/1×1 - 1/5=
=1/5 + 2/1 -1/5=
=1+5×2-1 tot asta supra /5=
=1+10-1 tot asta supra /5=
=11-1 totul supra /5=
=10/5 ( simplificat cu 5)=
=2/1 =
=2