What is longmult 15\times 15 ?

The solution to longmult 15\times 15 is 225

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longmult 15\times 15

long multiplication

15 \cdot 15

225

Solution steps

15 \cdot 15

Line up the numbers

\times 1155

Multiply the top number by the bottom number one digit at a time starting with the ones digit (from right to left)

Multiply the top number by the bolded digit of the bottom number

\times 1155

Mutliply the bold numbers:

5 \cdot 5 = 25

Carry

2

to the column on the left and write

5

in the result line

\frac{\times 2 1 1 5 5}{5}

Add the carried number to the multiplication:

2 + 1 \cdot 5 = 7

\frac{\times 2 1 1 5 5}{7 5}

Multiply the top number by the bolded digit of the bottom number

\frac{\times 1 1 5 5}{7 5}

Mutliply the bold numbers:

5 \cdot 1 = 5

\frac{\times 1 1 5 5}{7 5 5}

Mutliply the bold numbers:

1 \cdot 1 = 1

\frac{\times 1 1 5 5}{1 7 5 5}

Add the rows to get the answer. For simplicity, fill in trailing zeros

\frac{\times 1 1 5 5}{0 1 7 5 5 0}

75 + 150 = 225

= 225

2 x \times 2 x

\frac{3}{4} \div \frac{1}{8}

(x + a) (x + b)

x^{2} - x^{3}

\frac{40}{100}