Calculate the following determinant; 1234 2341 3412 4123

Calculate the following determinant; 1234 2341 3412 4123

The first line is multiplied by - 2, - 3, - 4 to the second, third and fourth line respectively, and then expanded according to the first line to obtain the third-order determinant, which is calculated by the formula

8.8-0.56 * (2 5 / 12-1 19 / 60 + 2.275) / 20 / 7
Original form=

8.8-0.56 * (2 5 / 12-1 19 / 60 + 2.275) / 20 / 7
Original formula = 8.8-0.56 (2 + 5 / 12-1-9 / 60 + 2 + 11 / 40) * 20 / 7
= 8.8-0.56(3+5/12-19/60+11/40)*20/7
= 8.8-0.56(3+5/12-19/60+11/40)*20/7
= 8.8-0.56(3+3/8)*20/7
= 8.8-2/25*7(27/8)*20/7
= 8.8-27/5
=44/5-27/5
=17/5
=3.4

The number written directly is 5 / 6-1 / 3 =? 3 / 8 × 4 / 7 =? 1 / 2 × 4 / 5 + 0.6 =? 1-7 / 12 =? 1 / 4 × 99 + 1 / 4 =? 28 △ 4 / 5 =?
1÷2/5×4/15=?

1/2
3/14
one
5/12
twenty-five
thirty-five
2/3

Take off formula calculation: 1 and 8 / 1-3 / 2 + 12 / 5 directly write the number: 4-6 / 1-3 / 1 =?

1:1-2:3 + 5:12
=27/24-16/24+10/24
=21/24
=7/8
4-6 1-3 1 = 3 and 1 / 2
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The number is 1 / 6 + 1 / 4 = 1-5 / 7 = 1 / 7-1 / 8 = 1 / 6 + 5 / 12 = 5 / 9-1 / 3=
emergency

1/6+1/4=5/12
1-5/7=2/7
1/7-1/8=1/56
1/6+5/12= 7/12
5/9-1/3=2/9
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Directly written number: 1 / 12 △ 14 / 9 =? 4 / 9 △ 3 / 8 =? 5 / 12 △ 8 / 5 =? 5 / 6 △ 12 / 10 =? 3 / 8 △ 5 / 3 =? 6 / 5 △ 5 / 2 =?

9/168; 32/27; 25/96; 25/36; 9/40; 12/25

Directly write the number 1 / 2-1 / 2 × 1 / 2 =? 4 / 7 △ 8 / 11 =? 9 △ 1 / 9 =? 2 / 7 × 3 =? 12 × 7 / 8 =? 9 / 25 × 5 / 3 =? 3 / 5 △ 9 =?

1/4 ,11/14 ,18 ,6/7 ,21/2 ,3/5 ,1/15

(): () = (24) () = 0.375 = 21: () = ()%

(3) : (8) = (9 / 24) = 0.375 = 21: (56) = (37.5)%

3 / () = 0.375 = 1 / 24 () = 21 / ()

3/8=0.375=9/24=21/56

3/（）=（）/24=24\（）=0.375=（）％

3/（8）=（9）/24=24\（64）=0.375=（37.5）％