3
30 ×
2 ÷
120×
28 ×
224×
84 ×
144×
40 ×
24 ×
4
90 ×
2 ÷
7
16 ×
40 ×
140×
2 ÷
2 ×
2 ÷
7
42 ×
32 ×
5 ÷
2 ÷
56 ×
5 ÷
36 ×