Add or subtract as indicated. 32.56 + 47.356 + 1.8

Key Concepts

Decimal Addition

Decimal addition involves aligning numbers by their decimal points to ensure that each digit is added in the correct place value. When adding decimals, it is crucial to maintain the same number of decimal places in the result, which may require adding zeros to the shorter numbers. This ensures accuracy in the final sum.

Place Value

Place value refers to the value of a digit based on its position within a number. In decimal numbers, each position represents a power of ten, with the rightmost digit being the tenths place, followed by hundredths, thousandths, and so on. Understanding place value is essential for correctly performing operations like addition and subtraction with decimals.

Rounding and Significant Figures

Rounding is the process of adjusting the digits of a number to make it simpler while maintaining its value close to the original. Significant figures are the digits in a number that contribute to its precision. When performing operations with decimals, it is important to consider rounding and significant figures to ensure that the final answer reflects the appropriate level of accuracy.