Algebra Examples

Evaluate 21-6
21-6216
Step 1
Subtract using long subtraction.
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Step 1.1
Set up the subtraction problem in long subtraction format.
2211
-66
Step 1.2
Borrow 1010 from the digit in the next column to the left. Add the borrowed 1010 to 11. Reduce the number that was borrowed from by 11.
111111
21
-6
Step 1.3
Subtract 6 from 11.
111
21
-6
5
Step 1.4
Subtract 0 from 1.
111
21
-6
15
111
21
-6
15
Step 2
The result of 21-6 is 15.
15
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7
7
8
8
9
9
4
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5
6
6
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×
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1
1
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2
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π
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0
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 [x2  12  π  xdx ]