What is longmult 100*10 ?

The solution to longmult 100*10 is 1000

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100*10

long multiplication

100 \cdot 10

1000

Solution steps

100 \cdot 10

Line up the numbers

\times 10100

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 10100

Mutliply the bold numbers:

0 \cdot 0 = 0

\frac{\times 1 0 1 0 0}{0}

Mutliply the bold numbers:

0 \cdot 0 = 0

\frac{\times 1 0 1 0 0}{0 0}

Mutliply the bold numbers:

1 \cdot 0 = 0

\frac{\times 1 0 1 0 0}{0 0 0}

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

\frac{\times 1 0 1 0 0}{0 0 0}

Mutliply the bold numbers:

0 \cdot 1 = 0

\frac{\times 1 0 1 0 0}{0 0 0 0}

Mutliply the bold numbers:

0 \cdot 1 = 0

\frac{\times 1 0 1 0 0}{0 0 0 0 0}

Mutliply the bold numbers:

1 \cdot 1 = 1

\frac{\times 1 0 1 0 0}{1 0 0 0 0 0}

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

\frac{\times 1 0 1 0 0}{0 1 0 0 0 0 0 0}

0 + 1000 = 1000

+ 01000000

Add the digits of the bolded column:

0 + 0 = 0

\frac{+ 0 1 0 0 0 0 0 0}{+ 0}

Add the digits of the bolded column:

0 + 0 = 0

\frac{+ 0 1 0 0 0 0 0 0}{+ 0 0}

Add the digits of the bolded column:

0 + 0 = 0

\frac{+ 0 1 0 0 0 0 0 0}{+ 0 0 0}

Add the digits of the bolded column:

0 + 1 = 1

\frac{+ 0 1 0 0 0 0 0 0}{+ 1 0 0 0}

= 1000

= 1000

30, 50 x

\frac{42}{50}

21 - 12

\frac{125}{8}

180 - 101