What is longmult 20*20 ?

The solution to longmult 20*20 is 400

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longmult 20*20

long multiplication

20 \cdot 20

400

Solution steps

20 \cdot 20

Line up the numbers

\times 2200

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 2200

Mutliply the bold numbers:

0 \cdot 0 = 0

\frac{\times 2 2 0 0}{0}

Mutliply the bold numbers:

2 \cdot 0 = 0

\frac{\times 2 2 0 0}{0 0}

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

\frac{\times 2 2 0 0}{0 0}

Mutliply the bold numbers:

0 \cdot 2 = 0

\frac{\times 2 2 0 0}{0 0 0}

Mutliply the bold numbers:

2 \cdot 2 = 4

\frac{\times 2 2 0 0}{4 0 0 0}

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

\frac{\times 2 2 0 0}{0 4 0 0 0 0}

0 + 400 = 400

+ 040000

Add the digits of the bolded column:

0 + 0 = 0

\frac{+ 0 4 0 0 0 0}{+ 0}

Add the digits of the bolded column:

0 + 0 = 0

\frac{+ 0 4 0 0 0 0}{+ 0 0}

Add the digits of the bolded column:

0 + 4 = 4

\frac{+ 0 4 0 0 0 0}{+ 4 0 0}

= 400

= 400

17 \cdot 17

\frac{25}{100}

(- 2)^{2} + 2

(7 - 1)^{2}

100 \cdot 100