Those who can calculate simply should (write out the calculation process) 1 / 4 + 1 / 5 + 1 / 2, 4 / 7 + 8 / 21 + 1 / 3, 7 / 8 + 5 / 36-1 / 8, 5 / 12 + 3 / 8 + 1 / 24 Speed is the key to speed;

Those who can calculate simply should (write out the calculation process) 1 / 4 + 1 / 5 + 1 / 2, 4 / 7 + 8 / 21 + 1 / 3, 7 / 8 + 5 / 36-1 / 8, 5 / 12 + 3 / 8 + 1 / 24 Speed is the key to speed;

1/4+1/5+1/2=5/20+4/20+10/20=19/20
4/7+8/21+1/3=12/21+8/21+7/21=27/21=9/7
7/8+5/36-1/8=7/8+1/8-5/36=3/4-5/36=22/36=11/18
5/12+3/8+1/24
=10/24+9/24+1/24
=20/24
=5/6

3, 6, 12 and 21 are 36 points

There are 28 methods! 6-3 + 12 + 21 = 366-3 + 21 + 12 = 366 + 12-3 + 21 = 366 + 12 + 21-3 = 366 + 21-3 + 12 = 366 + 21 + 12-3 + 6 + 21 = 3612-3 + 21 + 6 = 3612 + 6-3 + 21 = 3612 + 6 + 21-3 = 3612 / 6 * (21-3) = 3612 + 21-3 + 6 = 3612 * (21-3 * 6) = 3612 * (21-3) / 6 = 3612 + 21 + 6-3 = 361

A simple calculation method of 5.36 * 8.8 + 0.536 * 12

5.36*8.8+0.536*12
=5.36*8.8+0.536*1.2*10
=5.36*8.8+5.36*1.2
=5.36*(8.8+1.2)
=5.36*10
=53.6