Sixth grade > P.9 Add and subtract rational numbers GDR Add.
[tex] \frac{ - 3 \10{ + }{ - 9 \times \ \frac{910}{?} {?}{?} ?} {?} [/tex]
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[tex] \frac{ - 3}{10 } + - 9 \times \frac{9}{10} =[/tex]
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