you have to add
In the same way as you estimate them for whole numbers.
The basic idea is the same as when you estimate sums and differences of larger numbers (which may or may not be integers). You round the numbers to one or two decimal digits, then add them up.
Convert them to improper fractions and proceed.
Difference between the sum of the squares and the square of the sums of n numbers?Read more:Difference_between_the_sum_of_the_squares_and_the_square_of_the_sums_of_n_numbers
Number sense allows you to estimate the result of subtracting two mixed numbers, helping you assess whether your final answer is reasonable. By rounding the mixed numbers to the nearest whole numbers or simpler fractions, you can quickly gauge if the subtraction aligns with your expectations. If your calculated answer deviates significantly from this estimate, it may indicate an error in your computation. Additionally, having a solid number sense helps you recognize common patterns and relationships between numbers, which can aid in verifying your work.
Yes
In the same way as you estimate them for whole numbers.
The basic idea is the same as when you estimate sums and differences of larger numbers (which may or may not be integers). You round the numbers to one or two decimal digits, then add them up.
it would not be a good time to estimate mixed numbers is when both of the fractions are not a mixed number
When doing sums with mixed numbers, it is often easier to convert the mixed numbers to improper fractions, do the sum and convert any resulting improper fraction back to a mixed number. This is especially true of division, but with subtraction, if the fraction part of the second mixed number is larger than the fraction part of the first mixed number (subtracting the second from the first), this will result in requiring borrowing from the whole number of the first mixed number. Using improper fractions avoids this complication and makes all sums easier.
you can make at least 25 sums
Convert them to improper fractions and proceed.
Difference between the sum of the squares and the square of the sums of n numbers?Read more:Difference_between_the_sum_of_the_squares_and_the_square_of_the_sums_of_n_numbers
Infinitely many. 12+11, 13+10, 14+9, ... , 22+1, 23+0, 24+(-1), 25+(-2), ... and then you have sums with numbers to one decimal place (dp) such as 11.6+11.4, and so on. Not forgetting numbers to 2 dp, 3, dp, 4, dp, ... , infinitely many dp. But these are only sums of two numbers. There are sums of 3 numbers, 4 numbers, ... infinitely many.
you dont
11
average function