6 - 1 * 16 + 21 ÷ 3
Please help !!

Answer:
-3
Explanation:
6 - 1 · 16 + 21 ÷ 3
21 ÷ 3 = 7
6 - 1 · 16 + 7
1 · 16 = 16
6 - 16 + 7
= -3