Find the partial sums of 3 tens 5 ones + 5 tens 5 ones.

The correct answer is: 80 and 10

 3 tens 5 ones + 5 tens 5 ones can also be written as 35 + 55.
To find the partial sum use following steps
Step 1 : Write the number vertically

Step 2: Add the digits in tens place:

Step 3: Add the digits in ones place:

Thus the partial sum of  3 tens 5 ones + 5 tens 5 ones is 80 and 10.