(2Đ) 180 = 22.32.5 (0,5Đ)168 = 23.3.7 (0,5Đ)ƯCLN(180, 168) = 22.3...

bài 2 : - DE THI TOAN HK 1 CO DAP AN
Toán DE THI TOAN HK 1 CO DAP AN

Bài 2 : (2đ)

180 = 2

2

.3

2

.5 (0,5đ)

168 = 2

3

.3.7 (0,5đ)

ƯCLN(180, 168) = 2

2

.3 = 12 (0,5đ)

BCNN(180, 168) = 2

2

.3

2

.5.7 = 2520 (0,5đ)