Basic Math Examples

Multiply 10.5*20
Step 1
Multiply using long multiplication.
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Step 1.1
Multiply by . Place the result in the next column in the result line. There is one result line for each digit in .
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Step 1.2
Multiply by . Place the result in the next column in the result line. There is one result line for each digit in .
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Step 1.3
Multiply by . Place the result in the next column in the result line. There is one result line for each digit in .
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Step 1.4
Multiply by . Place the ones digit in the result line and carry the tens digit . There is one result line for each digit in .
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Step 1.5
Multiply by and add the carried . Place the result in the next column in the result line. There is one result line for each digit in .
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Step 1.6
Multiply by . Place the result in the next column in the result line. There is one result line for each digit in .
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Step 1.7
Add the numbers in each column. In this case, add , then place the in the result line.
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Step 1.8
Add the numbers in each column. In this case, add , then place the in the result line.
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Step 1.9
Add the numbers in each column. In this case, add , then place the in the result line.
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Step 1.10
Add the numbers in each column. In this case, add , then place the in the result line.
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Step 2
To find the number of decimal places needed in the answer, add the number of decimal places in the multiplier and multiplicand. In this case, there is a total of , so the answer must have decimal places as well.