The rounding of negative numbers is the same as the rounding of positive numbers. Rounding is an accurate counting reservation method, which has nothing to do with the sign of numbers. The rounded fourth house is 1, 2, 3, 4 and the fifth house is: 5, 6, 7, 8, 9.

For example, the following figures are rounded to one decimal place:

-2.45=-2.5

- 1. 13=- 1. 1

-3. 14 15=-3. 14

Extended data:

Calculation rules of negative numbers

1、+

Negative number 1+ negative number 2=- (negative number 1+ negative number 2)= negative number

Negative number+positive number = the sign takes the sign of the addend with larger absolute value, and the numerical value takes the addend with larger absolute value minus the addend with smaller absolute value.

2、-

Negative number 1- negative number 2= negative number 1+ (negative number 2)= negative number 1 plus the reciprocal of negative number 2, and then use negative number plus positive number to calculate.

Negative-positive =-(positive+negative) = negative? The subtraction of two numbers with different signs is equal to the sum of their absolute values.

3、×

Negative number 1× negative number 2= (negative number 1× negative number 2) = positive number

Negative x positive =-(positive x negative) = negative.

4、÷

Negative 1÷ negative 2= (negative 1÷ negative 2) = positive.

Negative/positive number =-(negative/positive number) = negative number

Generally speaking, dividing by the same symbol equals a positive number, and dividing by different symbols equals a negative number.