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OpenStudy (anonymous):
9/10+2/5-1/4
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OpenStudy (anonymous):
set all the denominators to be the same :D
OpenStudy (anonymous):
\[\frac{ 18 }{ 20 }+\frac{ 8 }{ 20 }=\frac{ 26 }{ 20 }-\frac{ 5 }{ 20 }=\frac{ 21 }{ 20 } or 1 \frac{ 1 }{ 20 }\]
OpenStudy (anonymous):
very good!
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