Evaluate 0.85*40

Math
0.85⋅40
Multiply using long multiplication.
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Multiply 0 by 5. Place the result in the next column in the result line. There is one result line for each digit in 40.
0.85
⨯40
0
Multiply 0 by 8. Place the result in the next column in the result line. There is one result line for each digit in 40.
0.85
⨯40
00
Multiply 0 by 0. Place the result in the next column in the result line. There is one result line for each digit in 40.
0.85
⨯40
000
Multiply 4 by 5. Place the ones digit (0) in the result line and carry the tens digit (2). There is one result line for each digit in 40.
2
0.85
⨯40
000
0
Multiply 4 by 8 and add the carried 2. Place the ones digit (4) in the result line and carry the tens digit (3). There is one result line for each digit in the 40.
32
0.85
⨯40
000
40
Multiply 4 by 0 and add the carried 3. Place the result in the next column in the result line. There is one result line for each digit in 40.
0.85
⨯40
000
340
Add the numbers in each column. In this case, add 0+0, then place the 0 in the result line.
0.85
⨯40
000
340
0
Add the numbers in each column. In this case, add 0+0, then place the 0 in the result line.
0.85
⨯40
000
340
00
Add the numbers in each column. In this case, add 0+4, then place the 4 in the result line.
0.85
⨯40
000
340
400
Add the numbers in each column. In this case, add 0+3, then place the 3 in the result line.
0.85
⨯40
000
340
3400
0.85
⨯40
000
340
3400
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 2, so the answer must have 2 decimal places as well.
34
Evaluate 0.85*40

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