Question

Đề bài: Tìm ƯCLN

a, ƯCLN ( 16, 24 )

b, ƯCLN ( 60, 90 )

c, ƯCLN ( 24, 84 )

d, ƯCLN ( 16, 60 )

e, ƯCLN ( 18, 77 )

g, ƯCLN ( 18, 90 )

h, ƯCLN ( 18, 30, 42 )

k, ƯCLN ( 26, 39, 48 )

Answer 1

a,8

b,30

c,12

d,4

e,1

g,18

h,6

k,1

Answer 2

a) ƯCLN ( 16, 24 )

16 = 2³              24 = 2².3

ƯCLN ( 16;24 ) = 2²= 4

b) ƯCLN ( 60, 90 )

60 = 2².3.5          90=2.3².5

ƯCLN ( 60;90 ) = 2.3.5 = 30

c)  ƯCLN ( 24, 84 )

24 = 2³.3                       84 = 2².3.7

ƯCLN ( 24;84 ) = 2².3 = 12

d) ƯCLN ( 16, 60 )

16 = 2⁴              60 = 2².3.5

ƯCLN ( 16;60 ) = 2²=4

e) ƯCLN ( 18, 77 )

18 = 2.3²             77=7.11

 ƯCLN ( 18; 77 ) = 1

g) ƯCLN ( 18, 90 )

18 = 2.3²           90=2.3².5

 ƯCLN ( 18;90 ) = 2.3² = 18

h) ƯCLN ( 18, 30, 42 )

18 = 2.3²             30 = 2.3.5         42 = 2.3.7

 ƯCLN ( 18;30;42 ) = 2.3=6

k) ƯCLN ( 26, 39, 48 )

26 = 2.13           39 = 3.13      48 = 2⁴.3

 ƯCLN ( 26;39;48 ) = 1

Answer 3

sai 30 :18 = ?