(1Đ) 168 = 23 . 3 . 7 ( 0,25Đ ) 180 = 22 . 32 . 5 ( 0,25Đ ) ƯCL...

bài 3: - KIEM TRA HK1 TOAN 6 CO DAP AN
Toán KIEM TRA HK1 TOAN 6 CO DAP AN

Bài 3: (1đ) 168 = 2

3

. 3 . 7 ( 0,25đ )

180 = 2

2

. 3

2

. 5 ( 0,25đ )

ƯCLN ( 168, 180 ) = 2

2

. 3 = 12 ( 0,25đ )

BCNN ( 168 , 180 ) = 2

3

. 3

2

. 5 . 7 = 2 520 ( 0,25đ )