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Basic Math Examples
4.5⋅124.5⋅12
Step 1
Step 1.1
Multiply 22 by 00. Place the result in the next column in the result line. There is one result line for each digit in 1212.
44 | .55 | 00 | |
⨯× | 11 | 22 | |
00 |
Step 1.2
Multiply 22 by 55. Place the ones digit (0)(0) in the result line and carry the tens digit (1)(1). There is one result line for each digit in 1212.
11 | |||
44 | .55 | 00 | |
⨯× | 11 | 22 | |
00 | 00 |
Step 1.3
Multiply 22 by 44 and add the carried 11. Place the result in the next column in the result line. There is one result line for each digit in 1212.
44 | .55 | 00 | |
⨯× | 11 | 22 | |
99 | 00 | 00 |
Step 1.4
Multiply 11 by 00. Place the result in the next column in the result line. There is one result line for each digit in 1212.
44 | .55 | 00 | |
⨯× | 11 | 22 | |
99 | 00 | 00 | |
0 |
Step 1.5
Multiply 1 by 5. Place the result in the next column in the result line. There is one result line for each digit in 12.
4 | .5 | 0 | |
⨯ | 1 | 2 | |
9 | 0 | 0 | |
5 | 0 |
Step 1.6
Multiply 1 by 4. Place the result in the next column in the result line. There is one result line for each digit in 12.
4 | .5 | 0 | |
⨯ | 1 | 2 | |
9 | 0 | 0 | |
4 | 5 | 0 |
Step 1.7
Add the numbers in each column. In this case, add 0+0, then place the 0 in the result line.
4 | .5 | 0 | |
⨯ | 1 | 2 | |
9 | 0 | 0 | |
4 | 5 | 0 | |
0 |
Step 1.8
Add the numbers in each column. In this case, add 0+0, then place the 0 in the result line.
4 | .5 | 0 | |
⨯ | 1 | 2 | |
9 | 0 | 0 | |
4 | 5 | 0 | |
0 | 0 |
Step 1.9
Add the numbers in each column. In this case, add 9+5, then place the 4 in the result line and carry the 1.
4 | .5 | 0 | |
⨯ | 1 | 2 | |
9 | 0 | 0 | |
4 | 5 | 0 | |
4 | 0 | 0 |
Step 1.10
Add the numbers in each column. In this case, add 0+4+1, then place the 5 in the result line.
4 | .5 | 0 | |
⨯ | 1 | 2 | |
9 | 0 | 0 | |
4 | 5 | 0 | |
5 | 4 | 0 | 0 |
4 | .5 | 0 | |
⨯ | 1 | 2 | |
9 | 0 | 0 | |
4 | 5 | 0 | |
5 | 4 | 0 | 0 |
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.
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