Some children can't think in order, while others can.

Let's see whose method is the best.

First, the list sorting method

()+5 & lt； 12, how much can I put in brackets? Children start with the smallest 0, and finally find that they can fill in 0, 1, 2, 3, 4, 5, 6. Of all the numbers that can be filled, 6 is the largest, so the answer is 6.

Second, transformation.

Is to turn inequality into equality.

1. First, the number 1 which is smaller than 12 is 1 1, 5+ several = 1 1, 6, so it is 6+5.

2. Just think ()+5 = 12,7, but if you fill in 7 and the number is not less than 1 2, then take a number less than17, which is 6.

Third, directly divide 12 into 5 and 7. If you fill in 7, it will be as big as 12, so you can only fill in 6 with a ratio less than 7.