Use pen and paper to work out the answer to $124.62+13.81$
Answer (2)
Align the decimal points of the two numbers.
Add the digits in each column, starting from the rightmost column.
Carry over when the sum of digits in a column is greater than 9.
The sum of 124.62 and 13.81 is 138.43 .
Explanation
Problem Analysis We are asked to find the sum of two decimal numbers: 124.62 and 13.81 .
Setting up the Addition To add these numbers, we can write them in column form, aligning the decimal points:
124.62
13.81
Adding Hundredths Now, we add the digits in each column, starting from the rightmost column (the hundredths place):
2 + 1 = 3 . So, the hundredths digit of the sum is 3.
Adding Tenths Next, we add the digits in the tenths place:
6 + 8 = 14 . We write down 4 and carry-over 1 to the ones place.
Adding Ones Now, we add the digits in the ones place, including the carry-over:
4 + 3 + 1 = 8 . So, the ones digit of the sum is 8.
Adding Tens Next, we add the digits in the tens place:
2 + 1 = 3 . So, the tens digit of the sum is 3.
Adding Hundreds Finally, we add the digits in the hundreds place:
1 + 0 = 1 . So, the hundreds digit of the sum is 1.
Final Result Combining the results, we get:
124.62
13.81
138.43
Therefore, 124.62 + 13.81 = 138.43 .
Examples
Imagine you're at the grocery store. You buy a bag of apples for $124.62 and a carton of milk for $13.81. Adding these two amounts helps you quickly calculate your total bill before you reach the checkout. This simple addition ensures you know exactly how much money you need.
The sum of 124.62 and 13.81 is 138.43 , calculated by aligning the numbers by their decimal points and adding each column step-by-step. Starting from the rightmost column, we add the hundredths, tenths, ones, tens, and hundreds places, carrying over when necessary. The final result confirms that 124.62 + 13.81 = 138.43 .
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