Me ajudem por favor

OBS:ABRA A FOTO​

resposta:

a) 30

b) 20

c) 36

d) 9

explicação passo-a-passo:

a) mdc(210,240)

210, 240 | 2

105, 120 | 2

105, 60 | 2

105, 30 | 2

105, 15 | 3

35, 5 | 5

7, 1 | 7

1, 1

mdc = 2.3.5 = 6.5 = 30

b) mdc (140, 120)

140, 120 | 2

70, 60 | 2

35, 30 | 2

35, 15 | 3

35, 5 | 5

7, 1 | 7

1, 1

mdc = 2² . 5 = 4.5 = 20

c) mdc (612, 216)

612, 216 | 2

306, 108 | 2

153, 54 | 2

153, 27 | 3

51, 9 | 3

17, 3 | 3

17, 1 | 17

1, 1

mdc = 2² . 3² = 4.9 = 36

d) mdc(117, 855)

117, 855 | 3

39, 285 | 3

13, 95 | 5

13, 19 | 13

1, 19 | 19

1, 1

mdc = 3² = 9

espero ter ajudado