There are several solutions to the landlord's example. 10-(3×-6+4)=24 10-3×-6-4=24 10-(4+3×-6)=24 10-4-3×-6=24 ( 10-4)×3 - 6=24 ( 10+4+-6)×3=24 1 0-(4+-6×3) =24 10-4 - 6×3=24 10-(-6×3+4)=24 10 - 6×3-4=24 ( 10+-6+4)×3=24

This is a hint.

1. Solve with 3× 8 = 24 and 4× 6 = 24.

Try to add the four numbers on the card face to 3 and 8, 4 and 6, and then multiply them. For example, 3,3,6 and 10 can form (10-6 ÷ 3) × 3 = 24, etc. For example, 2, 3, 3, 7 can be in the form of (7+3-2 )×

2. Use the operational characteristics of 0, 1 1 to solve it.

For example, 3,4,4,8 can form 3× 8+4-4 = 24,4,5, J and K can form11× (5-4)+13 = 24 and so on.

3. In the deck with solutions, the following six solutions are widely used: (We use A, B, C and D to represent the four numbers on the deck)

①(a—b)×(c+d)

Such as (10-4) × (2+2) = 24, etc.

②(a+b)÷c×d

Such as (10+2) ÷ 2× 4 = 24, etc.

③(a-b÷c)×d

Such as (3-2 ÷ 2) × 12 = 24, etc.

④(a+b-c)×d

Such as (9+5-2) × 2 = 24, etc.

⑤a×b+c—d

Such as11× 3+l-10 = 24, etc.

⑥(a-b)×c+d

Such as (4-L) × 6+6 = 24.

When playing games, the landlord might as well try the above method.

It should be noted that four cards (52 cards) in a deck can be randomly selected to have 1820 different combinations, among which 458 cards can't be counted as 24 points, such as A, A, A and 5.

"Clever calculation of 24 points" can greatly mobilize the coordinated activities of eyes, brain, hands, mouth and ears, which is very helpful to cultivate our rapid mental arithmetic ability and reaction ability.

I hope I can help you.