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### Grade 1 - Mathematics3.23 Addition - 3 Digits

Addition without carryover
1. Start from the ones place
2. Add the numbers in the ones place.
3. Add the numbers in the tens place.
4. Add the numbers in the hundreds plce.
 Question Step 1 Step 2 Step 3
Addition with carryover
1. 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.
2. 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.
3. 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 digit, 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
Answer: 1137
Directions: Find the sum of the 3 digit numbers. Also write at least ten examples of your own.
 Question 1: 472 + 610
Answer:

 Question 2: 59 + 455
Answer:

 Question 3: 659 + 301
Answer:

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