Question

Решите пожалуйста! Срочно нужно!!!!!

Answer 1

1.

1) $3\frac{7}{8} + 4 \frac{5}{12} =3+4 +\frac{7}{8} +\frac{5}{12} = 7+\frac{21+10}{24} =7\frac{31}{24} = 8 \frac{7}{24}$

2) $4\frac{3}{14} + 3\frac{2}{21} =4+3 +\frac{3}{14} +\frac{2}{21} = 7 +\frac{9+4}{42} = 7\frac{13}{42}$

3) $2-\frac{14}{17} = \frac{34-14}{17} =\frac{20}{17} = 1\frac{3}{17}$

4) $4\frac{8}{15}-2\frac{1}{30} = 4-2 +\frac{16-1}{30} = 2 \frac{15}{30} = 2 \frac{1}{2}$

5) $8\frac{1}{10}-3\frac{1}{6} = 8-3 + \frac{3-5}{30} = 4 \frac{28}{30} = 4\frac{14}{15}$

6) $11 - 7\frac{4}{7} =\frac{77}{7} -\frac{53}{7} = \frac{24}{7}= 3 \frac{3}{7}$

2.

a)$x+4\frac{3}{5}=7$$x=7-4\frac{3}{4} =\frac{28}{4}\frac{19}{4} =\frac{9}{4} =2\frac{1}{4}$$x=2\frac{1}{4}$

b)$7\frac{3}{11} -y=3\frac{1}{4}$$y= 7\frac{3}{11} =3\frac{1}{4} = 7-3 +\frac{3}{11} -\frac{1}{4} =\frac{12-11}{44} =4 \frac{1}{44}$

Answer 2

8 7/24;
7 13/42
1 3/17
2 1/2
4 14/15
3 3/7
Номер 2
Х+ 4 3/4=7
Х=7-4 3/4
Х=(6+4/4)-(4+3/4)
Х=(6-4)+(4/4-3/4)
Х=2 1/4

7 3/11-у=3 1/4
У=7 3/11- 3 1/4
У=(7-3)+(3/11-1/4)
У=4+12/44-11/44
У= 4 1/44