12 △ 7.4 =? Vertical

12 △ 7.4 =? Vertical

The five numbers are 24 points: 1, 7, 16, 14, 28, 29, 2, 19, 17, 3, 13, 21

（1）
(16+14-7+1)x(29-28)=24x1=24
（2）
（21-19）x17-13+3
=2x17-10
=34-1
=24

24:00: (1) 26728 (2) 88917 (3) 2101717 (4) 391421
1. Calculation: (1-2 / 1) × (1-3 / 1) × (1-4 / 1) × (1-5 / 1) × (1-6 / 1) × (1-7 / 1) × (1-8 / 1) × (1-9 / 1) × (1-10 / 1)

Calculation: original formula = 1 / 2 × 2 / 3 × 3 / 4 × 4 / 5 × 5 / 6 × 6 / 7 × 7 / 8 × 8 / 9 × 9 / 10
=1/10
Pay attention to approximate points

Count 24:00: (5) 7 19 14 17 21; (6) 19 21 23 15 11. Thank you

(19-17)*(21-7)-4=24
21+(15-11+23)/9=24
Here are two of the answers,