Subtract Decimals: 28.18 - 19.29 in Vertical Format

Let's solve the exercise in order:

Let's subtract the hundreds after the decimal point:

$8-9=$

Since we cannot subtract, we'll borrow ten from the tenths after the decimal point and get:

$18-9=9$

Let's subtract the tenths after the decimal point, remembering that we borrowed ten, therefore:

$1-1-2=0-2$

Since we cannot subtract, we'll borrow ten from the tens digit of the whole number and get:

$10-2=8$

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:

$8-1-9=7-9$

Since we cannot subtract, we'll borrow ten from the ones digit of the whole number and get:

$17-9=8$

Remember that we borrowed ten from the ones digit, therefore we get:

$2-1-1=0$

And we get:

$28.18\\-19.29\\08.89$

We can ignore the 0 before the 8, so we got the number: 8.89