2. Truncation method generally converts the value to be truncated into decimal, and then directly removes the decimal part and takes the value of the integer part. Can the value of the integer part be signed? ()? express
3. Tailing method has many practical applications, such as cutting and clothing. When there is extra cloth, the decimal point is usually rounded off. For example, every children's wear should use 1.2m fabric. The existing structure is17.6m. How many pieces can this dress be made? The result is 14 66? If the approximation is truncated by rounding method, 15 pieces are obtained. But when it comes to making clothes, as we all know, although the remaining cloth can be made into 0.6 pieces, it is not enough to make a piece of cloth, so we can only take the method of removing the tail.