Question

.Do not add. Use your understanding of numbers to answer. 239 186 439 714 which two numbers have a sum of 678? a) 239,439 B) 714,439 C) 438,186 *

Answer 1

Answer:

A. 239 and 439

Step-by-step explanation:

Just add the last digits and see the last digits in the sum given to you. you didn't need to add the complete numbers.

here the given number has 9 at its units place.

out of the given options on which of these pair the sum of unit digits is 8?

in option a, 9 + 9 = 18 which gives us the unit digit 8. that's why a is the answer.

Answer 2

Answer:

239,439

Step-by-step explanation:

The only way we can find is adding the last digit of both the numbers, i.e 9+9=18 . That's the only way to find the answer, as per my opinion