Solve Decimal Subtraction: 19.28 - 15.39

Video Solution

Solution Steps

00:00 Solve

00:03 When we need to subtract a larger number from the number we have

00:06 We'll borrow from the next number

00:09 The digit will decrease by 1, and the previous digit will increase by 10

00:13 Now we'll subtract from the larger number

00:16 We'll place it and continue to subtract and place accordingly

00:19 Again we'll borrow from the next number

00:22 The digit will decrease by 1, and the previous digit will increase by 10

00:25 Now we'll subtract from the larger number

00:28 We'll place it and continue to subtract and place accordingly

00:33 Let's reduce the 4

00:37 And this is the solution to the question

Step-by-Step Solution

Solve the following exercise in the correct order:

Subtract the hundreds after the decimal point:

$8-9=$

Given that we cannot subtract, we will instead borrow ten from the tenths digit after the decimal point as shown below:

$18-9=9$

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 will instead borrow ten from the tens digit of the whole number to obtain the following:

$11-3=8$

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

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

$9-1-5=3$

$1-1=0$

We obtain the following result:

$19.28\\-15.39\\03.89$

Ignoring the zero before the 3 we obtain the number: 3.89