РЕБЯЯТ, СРОЧНО!!! 1015 номер!!!!! Умоляю, быстрее!!!!

а) 2 13\30 - (1 1\10+1\5)  = 1 2/15    1 1\10+1\5 = 1 1/10 + 2/10 = 1 3/10      2 13/30 - 1 3/10 = 2 13/30 - 1 9/30 = 1 4/30 = 1 2/15 б) 2 8\15-(1 3\10+2\5)  = 5/6 1 3\10+2\5 = 1 3/10 + 4/10 = 1 7/10  2 8/15 - 1 7/10 = 2 16/30 - 1 21/30 = 1 46/30 - 1 21/30 = 25/30 = 5/6 в) 4 14\45-1 7\15-3\5  = 4 14/45 - 1 21/45 - 27/45 = 3 59/45 - 1 21/45 - 27/45 =              = 2 38/45 - 1 21/45 = 1 17/45 г) 4 11\30-2 9\20-1\10 = 4 22/60 - 2  27/60 - 6/60 = 4 22/60 - 2 21/60 = 2 1/60

[latex] 2\frac{13}{30}-( 1\frac{1}{10}+ \frac{1}{5})= [latex] 1\frac{2}{15} [/latex] 1) 1 \frac{1}{10}+ \frac{1}{5}= 1\frac{1}{10}+ \frac{2}{10}= 1\frac{3}{10} [/latex] 2) [latex] 2\frac{13}{30}- 1\frac{3}{10}= 2\frac{13}{30}- 1\frac{9}{30}= 1\frac{4}{30}= 1\frac{2}{15} [/latex] --------------------------------------------------- [latex] 2\frac{8}{15}-( 1\frac{3}{10}+ \frac{2}{5})=\frac{5}{6} [/latex] 1)[latex] 1\frac{3}{10}+ \frac{2}{5}= 1\frac{3}{10}+ \frac{4}{10}=1\frac{7}{10} [/latex] 2)[latex] 2\frac{8}{15}-1\frac{7}{10}= 2\frac{16}{30}- 1\frac{21}{30}=1\frac{46}{30}- 1\frac{21}{30}= \frac{25}{30}= \frac{5}{6} [/latex] ---------------------------------------------------- [latex] 4\frac{14}{45}- 1\frac{7}{15}- \frac{3}{5}= [latex] 2\frac{11}{45} [/latex] 1)[latex] 4\frac{14}{45}- 1\frac{7}{15}=[latex] 4\frac{14}{45}- 1\frac{21}{45}= =[latex] 3\frac{59}{45}-1\frac{21}{45}= 2\frac{38}{45} [/latex] 2)2\frac{38}{45} [/latex] -\frac{3}{5}= 2\frac{38}{45}- \frac{27}{45}=2 \frac{11}{45} [/latex] ------------------------------------------------------ [latex] 4\frac{11}{30}- 2\frac{9}{20}- \frac{1}{10}= [/latex]1 \frac{49}{60} [/latex] 1)[latex] 4\frac{11}{30}-2 \frac{9}{20}=4 \frac{22}{60}- 2\frac{27}{60}=3 \frac{82}{60}- 2\frac{27}{60}=1 \frac{55}{60} [/latex] 2)1 \frac{55}{60} [/latex]-[latex] \frac{1}{10}=1 \frac{55}{60}- \frac{6}{60}=1 \frac{49}{60} [/latex]