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

Ответы

artemmaslov25Artem 04.10.2020 06:22

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

ПОКАЗАТЬ ОТВЕТЫ

rufat2856 04.10.2020 06:22

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