Evaluate 0.4*10

Math
0.4⋅10
Multiply using long multiplication.
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Multiply 0 by 4. Place the result in the next column in the result line. There is one result line for each digit in 10.
0.4
⨯10
0
Multiply 0 by 0. Place the result in the next column in the result line. There is one result line for each digit in 10.
0.4
⨯10
00
Multiply 1 by 4. Place the result in the next column in the result line. There is one result line for each digit in 10.
0.4
⨯10
00
4
Multiply 1 by 0. Place the result in the next column in the result line. There is one result line for each digit in 10.
0.4
⨯10
00
04
Add the numbers in each column. In this case, add 0+0, then place the 0 in the result line.
0.4
⨯10
00
04
0
Add the numbers in each column. In this case, add 0+4, then place the 4 in the result line.
0.4
⨯10
00
04
40
0.4
⨯10
00
04
40
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 1, so the answer must have 1 decimal places as well.
4
Evaluate 0.4*10

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