Addition lesson
Addition facts (whole number)
1. The place value of a number starts from right to left in the following order: ones, tens, hundreds, thousands, ten thousands, hundred thousands, etc.
2. Addition is possible with two or more numbers.
3. When we add multiple numbers, the numbers to be added are called addends.
4. The result we get after adding the addends is called a sum.
5. The result (Sum) will be same even if two or more numbers are added in any order.
6. Adding 0 (zero) with a number will give the same number as the result.
7. Adding 1 (one) with a number will give the next number or successor of the number as the result.
How do you add numbers?
Example: Add the following numbers: 42784 and 4598
1. Write the numbers in proper columns.
2. Add all the numbers from the ones column (42784 + 4598.)
4 + 8 = 12 (1 tens , 2 ones).
Put the 2 in ones column and carry over 1 to the tens column.
3. Add all the numbers from the tens column (42784 + 4598) and the carried over 1.
8 + 9 + 1 = 18 (1 hundred , 8 tens).
Put the 8 in tens column and carry over 1 to the hundreds column.
4. Add all the numbers from the hundreds column (42784 + 4598) and the carried over 1.
7 + 5 + 1 = 13 (1 thousand , 3 hundreds).
Put the 3 in hundreds column and carry over 1 to the thousands column.
5. Add all the numbers from the thousands column (42784 + 4598) and the carried over 1.
2 + 4 + 1 = 7 ( 7 thousands)
Put the 7 in thousands column. Their is no carry over.
6. There is no ten thousands column for the second number (42784 + 4598).
So put the 4 in the ten thousands column of the result.