Выполните действие 8 /15 + 3/10 , 2 /3-1/15, 7/30+3/20, 1/9-1/18,3/4 - 0,5 , 1/4-1/8, 11/30 + 3/4 , 5/8 - 5/12 , 11/65+2/13, 0,6+2/5,1/5+17/20,1/7-1/14, 3/10+3/4, 28/57 - 3/19 , 2/25+0,02

8/15+3/10=16/30+9/30=25/30=1/6 2/3-1/15=10/15-1/15=9/15=3/5 7/30+3/20=14/60+9/60=25/60=5/12 1/9-1/18=2/18-1/18=1/18 3/4-5/10=15/20-10/20=5/20=1/4 1/4-1/8=2/8-1/8=1/8 11/30+3/4=22/60+45/60=67/60=1 целая 7/60 5/8-5/12=15/24-10/24=5/24 11/65+2/13=11/65+10/65=21/65 6/10+2/5=6/10+4/10=10/10=1 1/5+17/20=4/20+17/20=21/20=1 целая 1/20 1/7-1/14=2/14-1/14=1/14 3/10+3/4=6/20+15/20=21/20=1цел 1/20 28/57-3/19=28/57-9/57=17/57 2/25-2/100=8/100-2/100=6/100=3/50

1.[latex] \frac{8}{15} + \frac{3}{10} = \frac{16}{30} + \frac{9}{30} = \frac{25}{30} = \frac{5}{6} [/latex] 2.[latex] \frac{2}{3} - \frac{1}{15} = \frac{10}{15} - \frac{1}{15} = \frac{9}{15} = \frac{3}{5} [/latex] 3. [latex] \frac{7}{30} + \frac{3}{20} = \frac{14}{60} + \frac{9}{60} = \frac{23}{60} [/latex] 4. [latex] \frac{1}{9} - \frac{1}{18} = \frac{2-1}{18}= \frac{1}{18} [/latex] 5. [latex] \frac{3}{4} - 0,5 = \frac{3}{4} - \frac{1}{2} = \frac{3-2}{4}= \frac{1}{4} [/latex] 6. [latex] \frac{1}{4} - \frac{1}{8} = \frac{2-1}{8} = \frac{1}{8} [/latex] 7. [latex] \frac{11}{30} + \frac{3}{4} = \frac{44}{120} + \frac{90}{120} = \frac{134}{120} = 1 \frac{14}{120} = 1 \frac{7}{60} [/latex] 8. [latex] \frac{5}{8} - \frac{5}{12} = \frac{15}{24} - \frac{10}{24} = \frac{5}{24} [/latex] 9. [latex] \frac{11}{65} + \frac{2}{13} = \frac{11+10}{65} = \frac{21}{65} [/latex] 10. [latex] 0,6 + \frac{2}{5} = \frac{6}{10} + \frac{2}{5} = \frac{3+2}{5} = \frac{5}{5} = 1[/latex] 11. [latex] \frac{1}{5} + \frac{17}{20} = \frac{4+17}{20} = \frac{21}{20} = 1 \frac{1}{20} [/latex] 12. [latex] \frac{1}{7} - \frac{1}{14} = \frac{2-1}{14} = \frac{1}{14} [/latex] 13. [latex] \frac{3}{10} + \frac{3}{4} = 0,30 + 0,75=1,05[/latex] 14. [latex] \frac{28}{57} - \frac{3}{19} = \frac{28- 9}{57} = \frac{19}{57} = \frac{1}{3} [/latex] 15. [latex] \frac{2}{25} + 0,02 =0,04 + 0,02= 0,06[/latex]