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1)2 $\frac{7}{12}$ +2 $\frac{19}{49}$ = $\frac{31}{12}$ + $\frac{117}{49}$ = $\frac{1519}{588}$ $\frac{2923}{588}$
2) $\frac{2923}{588}$ *3= $\frac{8769}{3}$
3)64.5:6=10.75
4)4 $\frac{2}{7}$ *2.1= $\frac{30}{7}$ * $\frac{21}{10}$ =9
5)1.3*4 $\frac{1}{6}$ = $\frac{13}{10}$ * $\frac{25}{6}$ = $\frac{65}{12}$
6) $\frac{8769}{588}$ -6= $\frac{8769}{588} - \frac{3528}{588}= \frac{5241}{588}$
7) $\frac{5241}{588}+9= \frac{5241}{588}+ \frac{5242}{588}= \frac{10533}{588}$
8) $\frac{10533}{588}+ \frac{65}{12}= \frac{10533}{588}+ \frac{3185}{588}= \frac{13718}{588}=23 \frac{194}{588}=23 \frac{97}{294}$