How to calculate 15 multiplied by 15 using long multiplication

How to calculate 15 multiplied by 15

How to calculate 15 multiplied by 15 using long multiplication. Here is step-by-step how to calculate 15 times 15 using long multiplication:

Step 1: Setup
Set up your multiplication problem like this:

	1	5
x	1	5

Step 2: Multiply
5 x 5 = 25. Put 5 below the line and 2 as a reminder on top:

	2
	1	5
x	1	5
		5

Step 3: Multiply
5 x 1 = 5. Take 5 and add 2 from the previous step to get 7. Enter 7 at the bottom:

	1	5
x	1	5
	7	5

Step 4: Add 0
Enter a 0 at the bottom right as a place holder, because you now move over one digit:

	1	5
x	1	5
	7	5
+		0

Step 5: Multiply
1 x 5 = 5. Put 5 below the line and 0 as a reminder on top:

	0
	1	5
x	1	5
	7	5
+	5	0

Step 6: Multiply
1 x 1 = 1. Take 1 and add 0 from the previous step to get 1. Enter 1 at the bottom:

		1	5
x		1	5
		7	5
+	1	5	0

Step 7: Add to get answer
Add up the bottom two numbers (75 + 150 = 225) to get the answer:

		1	5
x		1	5
		7	5
+	1	5	0
=	2	2	5

The bottom line is the answer. Therefore, 15 times 15 equals:

225

Long Multiplication Calculator
Please enter another multiplication problem for us to explain and solve:

How to calculate 16 multiplied by 15
Here is the next multiplication problem in our math book that we solved with long multiplication.