Basic Math Examples

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Basic Math
Multiply -20*15
−20⋅15
Step 1
Multiply using long multiplication.
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Step 1.1
Factor out a −1.
−(20⋅15)
Step 1.2
Multiply 5 by 0. Place the result in the next column in the result line. There is one result line for each digit in 15.
20
×15
0
Step 1.3
Multiply 5 by 2. Place the ones digit (0) in the result line and carry the tens digit (1). There is one result line for each digit in 15.
20
×15
100
Step 1.4
Multiply 1 by 0. Place the result in the next column in the result line. There is one result line for each digit in 15.
20
×15
100
0
Step 1.5
Multiply 1 by 2. Place the result in the next column in the result line. There is one result line for each digit in 15.
20
×15
100
20
Step 1.6
Add the numbers in each column. In this case, add 0+0, then place the 0 in the result line.
20
×15
100
20
0
Step 1.7
Add the numbers in each column. In this case, add 0+0, then place the 0 in the result line.
20
×15
100
20
00
Step 1.8
Add the numbers in each column. In this case, add 1+2, then place the 3 in the result line.
20
×15
100
20
300
20
×15
100
20
300
Step 2
The result of 20⋅15 is 300.
300
Step 3
Multiply 300 by −1.
−300
 ⎡⎢⎣x2  12  √π  ∫xdx ⎤⎥⎦