Solve the following exercise:
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Solve the following exercise:
Let's solve the exercise in order:
Let's subtract the hundreds after the decimal point:
Since we cannot subtract, we'll borrow ten from the tenths after the decimal point and get:
Let's subtract the tenths after the decimal point, remembering that we borrowed ten, therefore:
Since we cannot subtract, we'll borrow ten from the tens digit of the whole number and get:
Finally, let's subtract the whole numbers before the decimal point accordingly.
Since we borrowed ten from the tens digit of the whole number we get:
And we get:
We can ignore the 0 before the 1, so we got the number: 1.29
1.29
\( \text{0.6+0}.5= \)
Decimal alignment ensures each digit is in the correct place value! Without proper alignment, you'd be subtracting tenths from hundredths, which gives completely wrong answers.
When the top digit is smaller than the bottom digit, you need to borrow from the next column to the left. Borrow 10, add it to your current digit, then subtract 1 from the column you borrowed from.
Borrowing works the same way across the decimal point! For example, if you need to borrow from the tenths place (2) to help the hundredths place (8), the tenths becomes 1 and hundredths becomes 18.
We don't write leading zeros before whole numbers! The zero in the ones place means there are no complete units, so we write 1.29 instead of 01.29.
Add your answer to the number you subtracted: . If you get the original number, your subtraction is correct!
If your final answer doesn't check out, trace back through each borrowing step. Make sure you subtracted 1 from each place you borrowed from and added 10 to the place that needed help.
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