Помогите решить! 1). (1 3/11+2 1/11)+3 6/11= 2). 5 16:21-(2 7/21+2 10/21)=

1) = 3 4/11 + 3 6/11 = 6 10/11 2) 5 16/21 - 4 17/21 = 4 37/21 - 4 17/21 = 20/21

1.[latex](1 \frac{3}{11}+2 \frac{1}{11})+3 \frac{6}{11}= ( \frac{14}{11} +\frac{23}{11})+ \frac{39}{11} =\frac{37}{11} +\frac{39}{11} =\frac{76}{11} =6\frac{10}{11} [/latex] 2.[latex]5 \frac{16}{21} -(2\frac{7}{21}+2 \frac{10}{21})= \frac{121}{21} -(\frac{49}{21}+\frac{52}{21} )= \frac{121}{21} -\frac{101}{21}=\frac{20}{21} [/latex]