It means to round a number to the nearest whole number, tens, hundreds, etc.
xxx=2x
When estimating sums, it is best to round to the nearest round number. If the last place on the right is less than 5, then round down. If the last place on the right is 5 or more, then round up. For example, 43+88. You would round the 43 down to 40 and the 88 up to 90. The estimated sum would 130.
The two strategies for estimating fraction sums are rounding and using compatible numbers. Rounding involves adjusting the fractions to simpler, nearby values that are easier to add, while compatible numbers are fractions that easily combine to form whole numbers or simple fractions. Both methods help simplify calculations and provide a quick approximation of the sum.
Add all the sums, then divide by the number of sums. (ie. the average.)
it could mean a lot of things
If you mean 27.905 added 3 times then it is 83.715
Find your number, look Right next door, five or more just add one more, four or less just ignore...
Guessing the answer in a division problem.
It can mean 'Estimating my dowry's worth' or 'Examine my darling wife'
None. It is more like adding.
The average or arithmetic mean.
Having a strong number sense of fractions enables individuals to recognize and manipulate fractions more easily, which is crucial for estimating sums. It allows for quick mental calculations by simplifying fractions to their nearest benchmarks, such as 0, ½, or 1. This skill helps in rounding fractions to make them easier to work with, facilitating faster and more accurate estimations without the need for precise calculations. Overall, a solid grasp of fractions enhances the ability to make educated guesses and check the reasonableness of answers.