Question

Ex1 page???

a) ƯCLN(64,160)

     BCNN( 64,160)

b)ƯCLN(66,165)

BCNN(66,165)

c) ƯC (144,180)

d) BC (8,10,12)

c) BCNN (15,17,24)

d)BCNN ( 15,18,24)

Answer 1

Câu c d ở cuối là bị trùng nhé câu c) thật ra lát câu e) nhé

Answer 2

a; ƯCLN(64;160); BCNN(64; 160)

      64  = 2⁶; 160 = 2⁵.5

     ƯCLN(64; 160) = 2⁵

     BCNN(64; 160) = 2⁶.5 = 320

b; ƯCLN(66; 165); BCNN(66; 165)

66 =  2.3.11

165 = 3.5.11

ƯCLN(66;165) = 3.11 = 33

BCNN(66; 165) = 2.3.5.11 = 330

 

 

 

Answer 3

c; ƯC(144; 180) 

144 =  2⁴.3²

180 = 2².3².5

ƯCLN(144; 180) = 2².3²= 36

ƯC(144; 180) = Ư(36) 

36 = 2².3²

ƯC(144; 180) = {1; 2; 3; 4; 6; 9; 12; 18; 36}

Answer 4

BC(8; 10; 12)

8 = 2³; 10 = 2.5; 12 = 2².3

BCNN(8; 10; 12) = 2³.3.5 = 120 

BC(8; 10; 12) = B(120) = {0; 120; 240; 360;..;}

Answer 5

e; BCNN(15; 17; 24)

   15  = 3.5

   17 = 17

    24 = 2³.3

    BCNN(15; 17; 24) = 2³.3.5.17 = 2040

 

 

Answer 6

f; BCNN(15; 18; 24)

15 = 3.5

18 = 2.3²

24 = 2³.3

BCNN(15; 18; 24) = 2³.3².5 =360