Final answer:
Place value in Mathematics involves understanding the value of each digit in a number relative to its position. When adding or subtracting, aligning digits according to place values is vital. The significance of each digit is critical for precise and accurate calculations.
Step-by-step explanation:
The subject of the question pertains to understanding place value of numbers in Mathematics, which is a fundamental concept taught in middle school. Place value denotes the value of each digit in a number based on its position relative to the decimal point. In the number 231.45, the digit 2 represents 200 (hundreds), 3 represents 30 (tens), 1 represents 1 (ones), 4 represents 0.4 (tenths), and 5 represents 0.05 (hundredths).
When performing addition and subtraction, the basic principle is to align numbers according to their place values before carrying out the operation. Attention must be paid to whole numbers to ensure each digit is placed in the correct column. With regards to the solution provided, the place value and the number of significant figures are crucial in determining the accuracy and precision of an answer. In mathematics, every digit has its place value, and this significance affects how we interpret and use numbers in computations irrespective of geographical or cultural differences.