Question

va rog daca puteti sa faceti exercitiile de jos​

Answer 1

Răspuns:

1. x/15 = 8/5

x×5 = 15×8

x×5 = 120 |÷5

x= 24 (a)

2. x-1/15 = 1/5

(x-1) ×5= 15×1

(x-1) ×5 = 15 |÷5

x -1 = 3| +1

x= 4 (c)

3. 2/27 = 6/...

Notam el. lipsa cu x

2×x = 6×27

2×x= 162 |÷2

x= 81 (a)

4. a/4 = 3/b

a×b = 4×3

a×b = 12 (c)

5. 1000×15/100=

15000/100= 150 (c)

6. Dupa aceleasi modele de rezolvare, se rezolva si celalalte.

a. 300

7. 50× 10/100=

500/100= 5

50+5 = 55 lei (b)

8. 50×10/100=

500/100= 5

50-5= 45 lei. (a)