Question

73 Găsiţi numerele naturale care, puse în locul lui a, fac adevărate scrierile: 15-a210; 9 + a < 14; 25 - a > 21; a + 18 < 23; 4 +a 12; 28-a> 22; 86 - a > 78 a-7 < 13; 10 - a < 12; a - 12 < 7.​

Answer 1

Explicație pas cu pas:

9+a<14

9+0=9

9+1=10

9+2=11

9+3=12

9+4=13

a= 0, 1, 2, 3, 4.

25-a>21

25-0=25

25-1=24

25-2=23

25-3=22

a= 0, 1, 2, 3,

a+18<23

0+18=18

1+18=19

2+18=20

3+18=21

4+18=22

a= 0, 1, 2, 3, 4,

28-a>22

28-0=28

28-1=27

28-2=26

28-3=25

28-4=24

28-5=23

a=0, 1, 2, 3, 4, 5

86-a>78

86-0=86

86-1=85

86-2=84

86-3=83

86-4=82

86-5=81

86-6=80

86-7=79

a= 0, 1, 2, 3, 4, 5, 6, 7

a-7<13

19-7=12

18-7=11

17-7=10

16-7=9

15-7=8

14-7=7

13-7=6

12-7=5

11-7=4

10-7=3

9-7=2

8-7=1

7-7=0

a= 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7

10-a<12

10-0=0

10-9=1

10-8=2

10-7=3

10-6=4

10-5=5

10-4=6

10-3=7

10-2=8

10-1=9

10-0=10

a=0,9,8,7,6,5,4,3,2,1,0

a-12<7

18-12=6

17-12=5

16-12=4

15-12=3

14-12=2

13-12=1

12-12=0

a=18, 17, 16, 15, 14, 13, 12.

Answer 2

Răspuns:

Explicație pas cu pas:

Sper ca intelegi. Sunt niste inecuatii care se rezolva.

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