Evaluate 3/10+-9/20

Math
310+-920
Move the negative in front of the fraction.
310-920
To write 310 as a fraction with a common denominator, multiply by 22.
310⋅22-920
Write each expression with a common denominator of 20, by multiplying each by an appropriate factor of 1.
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Multiply 310 and 22.
3⋅210⋅2-920
Multiply 10 by 2.
3⋅220-920
3⋅220-920
Combine the numerators over the common denominator.
3⋅2-920
Simplify the numerator.
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Multiply 3 by 2.
6-920
Subtract 9 from 6.
-320
-320
Move the negative in front of the fraction.
-320
The result can be shown in multiple forms.
Exact Form:
-320
Decimal Form:
-0.15
Evaluate 3/10+-9/20

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