Place Value Chart: Writing 100 in Decimal Structure Table

To solve the problem of expressing 100 in the decimal structure table, we will decompose it into hundreds, tens, and ones:

• Step 1: Identify each place value in the number 100.
• Step 2: Determine the hundreds digit by identifying the value in the hundred's place in the number 100, which is $1$.
• Step 3: Identify the tens digit, which is in the ten's place. For 100, the digit here is $0$.
• Step 4: Recognize the ones digit, which is $0$.

The number 100 is composed as follows:

• Hundreds: $1$
• Tens: $0$
• Ones: $0$

This corresponds to the number 100 being decomposed into $1$ hundred, $0$ tens, and $0$ ones.

Therefore, the solution, in terms of positioning in the table, is $1,0,0$.