Respostas

2014-04-02T22:16:19-03:00
14,9 = 2.3.3.7=126
7,21=3.7=21
20,25=2.2.5.5=100
10,12,20=2.2.3.5=60
12,25,36=2.2.3.3.25=900
1 5 1
2014-04-02T23:04:38-03:00
Olá, Jakelima1.

Se for para calcular o MMC de cada questão, será assim:

a)
14, 9 | 2
7, 9   | 3
7, 3   | 3
7, 1   | 7
1, 1  

MMC(14, 9) = 2 x 3² x 7 = 126

b)
7, 21 | 3
7, 7   | 7
1, 1

MMC(7, 21) = 3 x 7 = 21 

c)
20, 25 | 2
10, 25 | 2
5, 25   | 5
1, 5     | 5
1, 1

MMC(20, 25) = 2² x 5² = 100

d)
10, 12, 20 | 2
5, 6, 10     | 2
5, 3, 5       | 3
5, 1, 5       | 5
1, 1, 1

MMC(10, 12, 20) = 2² x 3 x 5 = 60

e)
12, 25, 36 | 2
6, 25, 18   | 2
3, 25, 9     | 3
1, 25, 3     | 3
1, 25, 1     | 5
1, 5, 1       | 5
1, 1, 1

MMC(12, 25, 36) = 2² x 3² x 5² = 900