Decomponha em fatores primos e determine o MDC de cada número dado.
A) 12, 18 e 30.
B) 18, 30 e 48.
C) 50 e 100.
D) 20, 120 e 132.
E) 120 e 200.
F) 90 e 120.
G) 180, 300 e 400.
H) 45, 54 e 72.
I) 20, 40, 50 e 200.
J) 180 e 350.
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a) 12= 2 x 2 x 3 18= 2 x 3 x 3 30= 2 x 3 x 5
12,18,30 2
6, 9,15 2
3, 9,15 3 2 x 2 x 3 x 3 x 5= 180
1, 3, 5 3
1, 1, 5 5
1, 1, 1
b) 18=2 x 3 x 3 30= 2 x 3 x 5 48=2 x 2 x 2 x 2 x 3
18,30,48 2
9,15,24 2
9,15,12 2
9,15, 6 2 2 x 2 x 2 x 2 x 3 x 3 x 5=720
9,15, 3 3
3, 5, 3 3
1, 5, 1 5
1, 1, 1
c) 50= 2 x 5 x 5 100=2 x 2 x 5 x 5
50,100 2
25,50 2
25,25 5 2 x 2 x 5 x 5=100
5, 5 5
1, 1
d) 20=2 x 2 x 5 120=2 x 2 x 2 x 3 x 5 132= 2 x 2 x 23
20,120,132 2
10, 60, 66 2
5, 30, 33 2
5, 15, 33 3 2 x 2 x 2 x 3 x 5 x 11=1320
5, 5, 11 5
1, 1, 11 11
1, 1, 1
e) 120=2 x 2 x 2 x 3 x 5 200=2 x 2 x 2 x 5 x 5
120,200 2
60,100 2
30, 50 2
15, 25 5 2 x 2 x 2 x 5 x 5 x 3=600
3, 5 5
3, 1 3
1, 1
f) 90=2 x 3 x 3 x 5 120=2 x 2 x 2 x 3 x 5
90,120 2
45, 60 2
45, 30 2
45, 15 5 2 x 2 x 2 x 5 x 3 x 3=360
9, 3 3
3, 1 3
1, 1
g) 180= 2 x 2 x 3 x 3 x 5 300=2 x 2 x 5 x 5 x 3 400=2 x 2 x 2 x 2 x 5 x 5
180,300,400 2
90,150,200 2
45, 75,100 2
45, 75, 50 2
45, 75, 25 5 2 x 2 x 2 x 2 x 5 x 5 x 3 x 3=900
9, 15, 5 5
9, 3, 1 3
3, 1, 1 3
1, 1, 1
h) 45= 5 x 3 x 3 54= 2 x 3 x 3 x 3 72=2 x 2 x 2 x 3 x 3
45,54,72 2
45,27,36 2
45,27,18 2
45,27, 9 3 2 x 2 x 2 x 3 x 3 x 3 x 5=1080
15, 9, 3 3
5, 3, 1 3
5, 1, 1 5
1, 1, 1
i) 20=2 x 2 x 5 40= 2 x 2 x 2 x 2 x 5 50=2 x 5 x 5 200=2 x 2 x 2 x 5 x 5
20,40,50,200 2
10,20,25,100 2
5,10,25, 50 2 2 x 2 x 2 x 5 x 5=200
5, 5,25, 25 5
1, 1, 5, 5 5
1, 1, 1, 1
j) 180=2 x 2 x 3 x 3 x 5 350=2 x 5 x 5 x 7
180,350 2
90,175 2
45,175 5
9, 35 5 2 x 2 x 5 x 5 x 3 x 3 x 7=6300
9, 7 3
3, 7 3
1, 7 7
1, 1
12,18,30 2
6, 9,15 2
3, 9,15 3 2 x 2 x 3 x 3 x 5= 180
1, 3, 5 3
1, 1, 5 5
1, 1, 1
b) 18=2 x 3 x 3 30= 2 x 3 x 5 48=2 x 2 x 2 x 2 x 3
18,30,48 2
9,15,24 2
9,15,12 2
9,15, 6 2 2 x 2 x 2 x 2 x 3 x 3 x 5=720
9,15, 3 3
3, 5, 3 3
1, 5, 1 5
1, 1, 1
c) 50= 2 x 5 x 5 100=2 x 2 x 5 x 5
50,100 2
25,50 2
25,25 5 2 x 2 x 5 x 5=100
5, 5 5
1, 1
d) 20=2 x 2 x 5 120=2 x 2 x 2 x 3 x 5 132= 2 x 2 x 23
20,120,132 2
10, 60, 66 2
5, 30, 33 2
5, 15, 33 3 2 x 2 x 2 x 3 x 5 x 11=1320
5, 5, 11 5
1, 1, 11 11
1, 1, 1
e) 120=2 x 2 x 2 x 3 x 5 200=2 x 2 x 2 x 5 x 5
120,200 2
60,100 2
30, 50 2
15, 25 5 2 x 2 x 2 x 5 x 5 x 3=600
3, 5 5
3, 1 3
1, 1
f) 90=2 x 3 x 3 x 5 120=2 x 2 x 2 x 3 x 5
90,120 2
45, 60 2
45, 30 2
45, 15 5 2 x 2 x 2 x 5 x 3 x 3=360
9, 3 3
3, 1 3
1, 1
g) 180= 2 x 2 x 3 x 3 x 5 300=2 x 2 x 5 x 5 x 3 400=2 x 2 x 2 x 2 x 5 x 5
180,300,400 2
90,150,200 2
45, 75,100 2
45, 75, 50 2
45, 75, 25 5 2 x 2 x 2 x 2 x 5 x 5 x 3 x 3=900
9, 15, 5 5
9, 3, 1 3
3, 1, 1 3
1, 1, 1
h) 45= 5 x 3 x 3 54= 2 x 3 x 3 x 3 72=2 x 2 x 2 x 3 x 3
45,54,72 2
45,27,36 2
45,27,18 2
45,27, 9 3 2 x 2 x 2 x 3 x 3 x 3 x 5=1080
15, 9, 3 3
5, 3, 1 3
5, 1, 1 5
1, 1, 1
i) 20=2 x 2 x 5 40= 2 x 2 x 2 x 2 x 5 50=2 x 5 x 5 200=2 x 2 x 2 x 5 x 5
20,40,50,200 2
10,20,25,100 2
5,10,25, 50 2 2 x 2 x 2 x 5 x 5=200
5, 5,25, 25 5
1, 1, 5, 5 5
1, 1, 1, 1
j) 180=2 x 2 x 3 x 3 x 5 350=2 x 5 x 5 x 7
180,350 2
90,175 2
45,175 5
9, 35 5 2 x 2 x 5 x 5 x 3 x 3 x 7=6300
9, 7 3
3, 7 3
1, 7 7
1, 1
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