Question

Правило округление деситичных дробей.

Answer 1

сначало у дроби отбрасываются все цыфры, стоящие правее разряда, до которого проводится округление. если при этом отброшенная часть начинается с цыфры, меняшей 5, то результат уже получен.

если отброшенная часть начинается с цифры, большей или равной 5, то последняя оставляемая цифрв увиличивается на еденицу

Answer 2

Rule for Rounding Decimal Numbers

When rounding decimal numbers, there are several rules and methods that can be used. The specific method chosen often depends on the context and the desired level of precision.

1. Rounding to a Specific Decimal Place: - When rounding a decimal number to a specific decimal place, such as the nearest hundredth or thousandth, the following rule is commonly used: - If the digit immediately to the right of the desired decimal place is 5 or greater, round up. If it is less than 5, round down. - For example, when rounding 3.14159 to the nearest hundredth, it becomes 3.14 because the digit in the thousandths place (5) is rounded down.

Source: 2. Rounding to the Nearest Whole Number: - When rounding a decimal number to the nearest whole number, the rule is as follows: - If the decimal portion is 0.5 or greater, round up to the next whole number. If it is less than 0.5, round down to the current whole number. - For example, rounding 7.5 to the nearest whole number results in 8, while rounding 7.4 results in 7.

Source: 3. Rounding in Mathematical Operations: - When performing mathematical operations involving rounding, such as division, the rules for rounding can vary based on the specific context and requirements of the calculation. - For example, when dividing 100 by 14.6, the result is 6.849. Rounding to the nearest whole number gives 7, while rounding to one decimal place gives 6.8.

Source: These rules provide a framework for rounding decimal numbers to specific decimal places or whole numbers, ensuring consistency and accuracy in mathematical calculations.