Which of the following is the estimated sum of twenty-five, thirty, and thirty-five using compatible numbers?
A. 110
B. 100
C. 90
D. 80
To find the estimated sum of twenty-five, thirty, and thirty-five using compatible numbers, we need to round each number to a compatible number and then add them together.
Compatible numbers are numbers that are close in value to the original numbers and make the calculations easier. In this case, we can round twenty-five to thirty, thirty to thirty, and thirty-five to forty. Adding these rounded numbers together will give us the estimated sum.
So, the estimated sum of twenty-five, thirty, and thirty-five using compatible numbers is:
30 + 30 + 40 = 100
Therefore, the correct answer is B. 100.