Solve Decimal Subtraction: 19.28 - 15.39

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 digit after the decimal point and get:

$18-9=9$

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

$2-1-3=1-3$

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

$11-3=8$

Finally, let's subtract the whole numbers before the decimal point accordingly.

Let's remember that we borrowed ten from the tens digit, therefore:

$9-1-5=3$

$1-1=0$

And we get:

$19.28\\-15.39\\03.89$

We can ignore the zero before the 3 and we got the number: 3.89