Dau coroanaaa repede ​

Multimea numerelor naturale N={0,1,2,3,......}

Multimea numerelor intregi Z={...... -2, -1, 0, 1,2,3.....} Adica include N plus numerele negative

Multimea numerelor rationale Q include ce e in Z  plus fractiile/numerele cu virgula

1. A

2. A

3. A

4. A

5. A

6. A

7. F

8. A

9. F

10. A

11. A

12. F

13. A

Răspuns:

1) 2,(3) ∈ Q (A)

2) 0,732 ∈ Q (A)

3) 1/4=0,25 ∈ Q (A)

4) 150 ∈ N (A)

5) 1,4(3) ∈ Q (A)

6) 1,2 ∈ Q (A)

7) 0,71 ∈ N (F)

0,71 ∈ Q

8) 2,3 ∈ Q (A)

9) -150 ∈ N (F)

-150 ∈ Z

10) 8/6=1,(3) ∈ Q (A)

11) 0 ∈ Q A

0 ∈ N*

12) 1,5 ∈ N (F)

1,5 ∈ Q

13) 7 ∈ Q (A)

7 ∈ N