0.7
6
0.7
1.
1
725 - 75 = 650
15.54 is rounded to 2 decimal places and it makes little sense to express a number from 2 dp to 3 dp but, since you have asked, the answer is 15.540
0.7
The number 2.
Rounding is closer because the amount added to one number is the same as the amount subtracted from the other number which makes the answer match exactly.
A decimal number is simply a way of representing a number in such a way that the place value of each digit is ten times that of the digit to its right. A decimal representation does not require a decimal point.
5
A decimal number is simply a way of representing a number in such a way that the place value of each digit is ten times that of the digit to its right. A decimal representation does not require a decimal point. So provided the number is a decimal fraction, it can be represented as a mixed number. If it is a decimal integer then it is not a mixed number and it makes no sense to try to represent it as one.
1.
1
232.42 Rounding makes a number simpler, and a decimal shorter. This number has only two decimal places to begin with, and rounding can't give it three.
6
725 - 75 = 650
Leave it exactly as it is. The answer is 511 - without a decimal point or any other frills. Since it is already an integer, rounding to the nearest hundredth makes no difference.