134. Điền kí hiệu ∈ hoặc \(\notin\) vào ô vuông cho đúng:
a) 4 \(\square\) ƯC (12, 18); b) 6 \(\square\) ƯC (12, 18);
c) 2 \(\square\) ƯC (4, 6, 8); d) 4 \(\square\) ƯC (4, 6, 8);
e) 80 \(\square\) BC (20, 30); g) 60 \(\square\) BC (20, 30);
h) 12 \(\square\) BC (4, 6, 8); i) 24 \(\square\) BC (4, 6, 8)
a) 4 \(\notin\) ƯC (12, 18); b) 6 ∈ ƯC (12, 18);
c) 2 ∈ ƯC (4, 6, 8); d) 4 \(\notin\) ƯC (4, 6, 8);
e) 80 \(\notin\) BC (20, 30); g) 60 ∈ BC (20, 30);
h) 12 \(\notin\) BC (4, 6, 8); i) 24 ∈ BC (4, 6, 8)