Question

помогите пожалуйста!!!!

Answer 1

313.
1) frac{11}{30} + frac{4}{15} + frac{4}{10} = frac{11+8+9}{30} = frac{28}{30}
2) frac{17}{40} + frac{9}{20} + frac{1}{10} = frac{17+18+4}{40} = frac{39}{40}
3) frac{2}{5} + frac{3}{8} + frac{7}{10} = frac{16+15+28}{40} = 1frac{19}{40}

Answer 2

313:
1)11/30 +4/15+3/10=18/55;
2)17/40 +9/20+1/10=27/70;
3)2/5+3/8+7/10=12/23.
314:
1)17/36-5/18=12/18;
2)49/50-14/25=35/25;
3)18/16-2/3=16/13;
4)23/24-7/8=16/16.