Basic Math Examples

Popular Problems
Basic Math
Evaluate 0.40*50
0.4⋅50
Step 1
Multiply using long multiplication.
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Step 1.1
Multiply 0 by 0. Place the result in the next column in the result line. There is one result line for each digit in 50.
0.40
⨯50
0
Step 1.2
Multiply 0 by 4. Place the result in the next column in the result line. There is one result line for each digit in 50.
0.40
⨯50
00
Step 1.3
Multiply 0 by 0. Place the result in the next column in the result line. There is one result line for each digit in 50.
0.40
⨯50
000
Step 1.4
Multiply 5 by 0. Place the result in the next column in the result line. There is one result line for each digit in 50.
0.40
⨯50
000
0
Step 1.5
Multiply 5 by 4. Place the ones digit (0) in the result line and carry the tens digit (2). There is one result line for each digit in 50.
2
0.40
⨯50
000
00
Step 1.6
Multiply 5 by 0 and add the carried 2. Place the result in the next column in the result line. There is one result line for each digit in 50.
0.40
⨯50
000
200
Step 1.7
Add the numbers in each column. In this case, add 0+0, then place the 0 in the result line.
0.40
⨯50
000
200
0
Step 1.8
Add the numbers in each column. In this case, add 0+0, then place the 0 in the result line.
0.40
⨯50
000
200
00
Step 1.9
Add the numbers in each column. In this case, add 0+0, then place the 0 in the result line.
0.40
⨯50
000
200
000
Step 1.10
Add the numbers in each column. In this case, add 0+2, then place the 2 in the result line.
0.40
⨯50
000
200
2000
0.40
⨯50
000
200
2000
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 2, so the answer must have 2 decimal places as well.
20
 [x2  12  √π  ∫xdx ]