Generally, we start adding digits from the left side (first we add the digits in the hundreds place, then tens place and so on). Suppose, in the two given problems, you start adding digits from the left side, then in which problem will you get the correct summation? Problem 1 231 +342 Left Right Problem 2 161 +354 Left Right (A) Only in problem 1 (B) Only in problem 2 (C) In both problem 1 and 2 (D) None Answer:
Answer (1)
To solve this question, we need to determine if adding from left to right will give the correct result in the given problems.
Let's examine each problem:
Problem 1: Add 1231 and 342
If we add from left to right:
Add the hundreds place: 1 ( f ro m 1231 ) + 0 ( f ro m 342 ) = 1.
Add the tens place: 2 ( f ro m 1231 ) + 3 ( f ro m 342 ) = 5.
Add the units place: 3 ( f ro m 1231 ) + 4 ( f ro m 342 ) = 7.
Add the last digits: 1 ( f ro m 1231 ) + 2 ( f ro m 342 ) = 3.
This method would assemble the number 1573, which is incorrect as 1231 + 342 equals 1573.
Problem 2: Add 2161 and 354
If we add from left to right:
Add the thousands place: 2 ( f ro m 2161 ) + 0 ( f ro m 354 ) = 2.
Add the hundreds place: 1 ( f ro m 2161 ) + 3 ( f ro m 354 ) = 4.
Add the tens place: 6 ( f ro m 2161 ) + 5 ( f ro m 354 ) = 11, carry over 1.
Add the units place: 1 ( f ro m 2161 ) + 4 ( f ro m 354 ) = 5.
Considering the carry overs in the tens and units places, the resulting number would be distorted.
The result of 2161 + 354 is actually 2515, not achievable through left addition without proper carry adjustment.
In both cases, adding from left to right without considering other proper adjustments like carrying between columns will not yield a correct sum.
So, the correct option would be:
(D) None
