Basic Math Examples

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Basic Math
Evaluate 7/8-7/10
78-71078−710
Step 1
To write 7878 as a fraction with a common denominator, multiply by 5555.
78⋅55-71078⋅55−710
Step 2
To write -710−710 as a fraction with a common denominator, multiply by 4444.
78⋅55-710⋅4478⋅55−710⋅44
Step 3
Write each expression with a common denominator of 4040, by multiplying each by an appropriate factor of 11.
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Step 3.1
Multiply 7878 by 5555.
7⋅58⋅5-710⋅447⋅58⋅5−710⋅44
Step 3.2
Multiply 88 by 55.
7⋅540-710⋅447⋅540−710⋅44
Step 3.3
Multiply 710710 by 4444.
7⋅540-7⋅410⋅47⋅540−7⋅410⋅4
Step 3.4
Multiply 1010 by 44.
7⋅540-7⋅4407⋅540−7⋅440
7⋅540-7⋅4407⋅540−7⋅440
Step 4
Combine the numerators over the common denominator.
7⋅5-7⋅4407⋅5−7⋅440
Step 5
Simplify the numerator.
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Step 5.1
Multiply 77 by 55.
35-7⋅44035−7⋅440
Step 5.2
Multiply -7−7 by 44.
35-284035−2840
Step 5.3
Subtract 2828 from 3535.
740740
740740
Step 6
The result can be shown in multiple forms.
Exact Form:
740740
Decimal Form:
0.1750.175
 [x2  12  √π  ∫xdx ]  ⎡⎢⎣x2  12  √π  ∫xdx ⎤⎥⎦