Addition without carryover
 Start from the ones place
 Add the numbers in the ones place.
 Add the numbers in the tens place.
 Add the numbers in the hundreds place.
Question  Step 1  Step 2  Step 3 




Addition with carryover
 Start from the ones place, add the numbers in that place.
If the sum is one digit, place in the units place.
If the sum is two digits, place right number in the units place and left number as carryover.
 Add the numbers in the tens place (also add carryover if any)
If the sum is one digit, place in the units place.
If the sum is two digits, place right number in the units place and left number as carryover.
 Add the numbers in the hundreds place (also add carryover if any)
If the sum is one digit, place in the units place.
If the sum is two digits, place right number in the units place and left number as carryover.
Question  Step 1  Step 2  Step 3 




 Add units digits  Add tens digits and carryover  Add hundreds digits 
 9+8=17  1+1+1=3  8+3=11 
Start from the ones place, add the numbers in that place, then move on to the tens and to the hundreds.
Here we get 9+8 = 17, since it a 2 digit number we write 7 under ones place and take 1 as carry over in the tens place.
Hence in tens place we have 1+1+1 = 3, since it is a 1 digit number, write 3 under the tens place.
In hundreds place we get, 8+3 = 11. Hence the answer is 1137
Answer: 1137
Directions: Find the sum of the 3 digit numbers. Also write at least ten examples of your own of each kind.
