The distance left to run is 1.8 miles, using decimal subtraction.
The standard addition and subtraction rules apply when adding and subtracting decimals. The decimal places following the decimal point are the only things that need attention. The columns in which the numbers are written must reflect the place values before and after the decimal point. According to the decimal place value chart, place values before the decimal point begin with ones, tens, hundreds, and so forth, but place values following the decimal point begin with tenths, followed by hundredths, and so forth.
When adding decimals, we begin on the right side and work our way left, adding each column as we go.
Decimal subtraction is performed in the same manner as whole number subtraction. The numbers only need to be written correctly based on their place values.
Those decimal figures that do not have the same number of digits following the decimal point are referred to as "unlike decimals." For instance, because 1.67 has two digits after the decimal point and 8.917 has three numbers after the decimal point, they are both "unlike decimals." In other terms, it is argued that unlike decimals have different lengths. Even with these dissimilar decimals, addition and subtraction can be easily completed. Simply inserting zeros in the areas where the length of the decimal values differs will change the "unlike decimals" into "like decimals." The decimal digits in each of the numbers become equal in this fashion, making it simpler to add or subtract them.
In the question, we are asked the distance left to run, if we went for a 7.4 miles run and ran 5.6 miles.
The distance left will be the difference between the two distances, that is,
The distance left = The total distance - The distance already ran,
or, The distance left = 7.4 - 5.6 miles = 1.8 miles.
Thus, the distance left to run is 1.8 miles, using decimal subtraction.
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