Long Multiplication: 15 × 15

Long Multiplication Calculator

What is 15 × 15?

Answer

15 × 15 =

225

2 partial products: 15 × 5 = 75 and 15 × 10 = 150.

15 × 15 in a column

		1	5
×		1	5
		7	5
+	1	5	0
	2	2	5

Step by step: 15 × 15

Step 1Multiply the multiplicand by the last digit of the multiplier, 5: 15 × 5 = 75.
- 5 × 5 = 25. Write 5 and carry 2.
- 1 × 5 = 5, plus the carried 2 makes 7. Write 7.
Step 2The next digit of the multiplier is 1, and it stands for 10: 15 × 10 = 150.
- 5 × 1 = 5. Write 5.
- 1 × 1 = 1. Write 1.
Sum of the partial products75 + 150 = 225

Similar examples to practise

Related Calculations

See Also

Times Table Chart - Any number from 1 to 100, rows from ×1 to ×12
Long Division Calculator - Step-by-step long division with detailed explanation
Multiplying Fractions Calculator - Multiply fractions, mixed numbers and whole numbers step by step
Factors of a Number - List all Factors and Factor Pairs of a Number
Greatest Common Factor - Find the Greatest Common Factor (GCF) of two numbers
Least Common Multiple - Find the Least Common Multiple (LCM) of two numbers

Recalculate with different values ↑

Products of 15

Multiplication	Product
15 × 1	15
15 × 2	30
15 × 3	45
15 × 4	60
15 × 5	75
15 × 6	90
15 × 7	105
15 × 8	120
15 × 9	135
15 × 10	150
15 × 11	165
15 × 12	180
15 × 15	225

FAQ

What is 15 × 15?

15 × 15 = 225

Is 225 a square number?

Yes. 15 × 15 = 225, so 225 is the square of 15. A square is simply a number multiplied by itself, which is why both factors here are the same.

How do you check that 15 × 15 = 225?

Divide the product back by one of the factors: 225 ÷ 15 = 15 exactly, with no remainder. Multiplication and division undo each other, which is what makes this check work.

What are the partial products of 15 × 15?

They are 75 + 150, and adding them gives 225.

See Also