Solve the following exercise:
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Solve the following exercise:
To avoid confusion in solving the exercise, we will first add two zeros to the number 131.2 as follows:
Now let's solve the exercise in order:
Let's connect the thousandths after the decimal point:
Let's connect the hundredths after the decimal point:
Let's connect the tenths after the decimal point:
Finally, let's connect the whole numbers before the decimal point accordingly:
And we obtain the following:
443.722
Choose the correct writing form:
Adding zeros like 131.200 helps you see each place value clearly! The zeros don't change the number's value, but they make it easier to add column by column without missing any digits.
Always extend the shorter decimal with zeros until both numbers have the same number of decimal places. This prevents place value confusion during addition.
Start from the rightmost column (thousandths) and work left, just like with whole numbers. This way you can handle any carrying that might be needed.
The decimal point in your answer goes in the same column as the decimal points in the problem. Since they're aligned, your answer's decimal point lines up too!
You'll get the wrong answer! For example, treating this as 1312 + 312522 would give a completely different result. Always double-check your decimal point alignment.
Yes! Use estimation: 131 + 313 ≈ 444, so 443.722 makes sense. You can also add the numbers in reverse order to verify you get the same result.
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