To add
346
421
+ 152
Starting woth the ones place 6 + 1 + 2 = 9, because, the sum of the digits in the ones place is not upto 10, we will not regroup the ones place.
Thus, the answer to 13a is NO
Since, we did not regroup the ones place, there is no regrouped tens to add, thus the answer to 13b is NO.
Next, for the tens place, 4 + 2 + 5 = 11, because the sum of the digits in the ones place is upto 10, we regroup the tens place.
Thus, the answer to 13c is YES.
Since, we regrouped the ones place, we add the regrouped hundred, thus the answer to 13b is YES.
Finally, for the hundred place, 1 + 3 + 4 + 1 = 9
Therefore, the sum of
346
421
+ 152
is 919
