8. 5/6+1/2+3/7=
9. 3/8+1/2+2/5=
10. 3/4+4/5+3/10=
11. 1 1/4+5/6=
12. 7/8+2 3/4=
13. 4 2/5+3/7=
14.2 1/2+5/6=
15.3 3/5+1/4=
16.1 1/4+ 2 3/5+3 1/2=
17.4 2/3+3 1/6+2 1/5=
18.3 1/7+2 1/4+5 1/2=
19.10 2/5+8 1/4+3 7/8=
20.15 2/5+4/7+10 1/2=
Nomor 7
[tex] \frac{1}{7} + \frac{1}{2} + \frac{2}{3} \\ \\ = \frac{6 + 21 + 28}{42} \\ \\ = \frac{55}{42} \\ \\ = 1 \frac{13}{42} [/tex]
[tex] \\ [/tex]
Nomor 8
[tex] \frac{5}{6} + \frac{1}{2} + \frac{3}{7} \\ \\ = \frac{35 + 21 + 18}{42} \\ \\ = \frac{74}{42} \\ \\ = 1 \frac{32 \div 2}{42 \div 2} \\ \\ = 1 \frac{16}{21} [/tex]
[tex] \\ [/tex]
Nomor 9
[tex] \frac{3}{8} + \frac{1}{2} + \frac{2}{5} \\ \\ = \frac{15 + 20 + 16}{40} \\ \\ = \frac{51}{40} \\ \\ = 1 \frac{11}{40} [/tex]
[tex] \\ [/tex]
Nomor 10
[tex] \frac{3}{4} + \frac{4}{5} + \frac{3}{10} \\ \\ = \frac{15 + 16 + 6}{20} \\ \\ = \frac{37}{20} \\ \\ = 1 \frac{17}{20} [/tex]
[tex] \\ [/tex]
Nomor 11
[tex]1 \frac{1}{4} + \frac{5}{6} \\ \\ = \frac{5}{4} + \frac{5}{6} \\ \\ = \frac{30 + 20}{24} \\ \\ = \frac{50}{24} \\ \\ = 2\frac{2 \div 2}{24 \div 2} \\ \\ = 2 \frac{1}{12} [/tex]
[tex] \\ [/tex]
Nomor 12
[tex] \frac{7}{8} + 2 \frac{3}{4} \\ \\ = \frac{7}{8} + \frac{11}{4} \\ \\ = \frac{7 + 22}{8} \\ \\ = \frac{29}{8} \\ \\ = 3 \frac{5}{8} [/tex]
[tex] \\ [/tex]
Nomor 13
[tex]4 \frac{2}{5} + \frac{3}{7} \\ \\ = \frac{22}{5} + \frac{3}{7} \\ \\ = \frac{154 + 15}{35} \\ \\ = \frac{169}{35} \\ \\ = 4\frac{29}{35} [/tex]
[tex] \\ [/tex]
Nomor 14
[tex]2 \frac{1}{2} + \frac{5}{6} \\ \\ = \frac{5}{2} + \frac{5}{6} \\ \\ = \frac{15 + 5}{6} \\ \\ = \frac{20 \div 2}{6 \div 2} \\ \\ = \frac{10}{3} \\ \\ = 3 \frac{1}{3} [/tex]
[tex] \\ [/tex]
Nomor 15
[tex]3 \frac{3}{5} + \frac{1}{4} \\ \\ = \frac{18}{5} + \frac{1}{4} \\ \\ = \frac{72 + 5}{20} \\ \\ = \frac{77}{20} \\ \\ =3 \frac{17}{20} [/tex]
[tex] \\ [/tex]
Nomor 16
[tex]1 \frac{1}{4} + 2 \frac{3}{5} + 3 \frac{1}{2} \\ \\ = \frac{5}{4} + \frac{13}{5} + \frac{7}{2} \\ \\ = \frac{25 + 52 + 70}{20} \\ \\ = \frac{147}{20} \\ \\ = 7 \frac{7}{20} [/tex]
[tex] \\ [/tex]
Nomor 17
[tex]4 \frac{2}{3} + 3 \frac{1}{6} + 2 \frac{1}{5} \\ \\ = \frac{14}{3} + \frac{19}{6} + \frac{11}{5} \\ \\ = \frac{140 + 95 + 66}{30} \\ \\ = \frac{201}{30} \\ \\ =6 \frac{21 \div 3}{30 \div 3} \\ \\ = 6 \frac{7}{10} [/tex]
[tex] \\ [/tex]
Nomor 18
[tex]3 \frac{1}{7} + 2 \frac{1}{4} + 5 \frac{1}{2} \\ \\ = \frac{22}{7} + \frac{9}{4} + \frac{11}{2} \\ \\ = \frac{88 + 63 + 154}{28} \\ \\ = \frac{305}{28} \\ \\ =10 \frac{25}{28} [/tex]
[tex] \\ [/tex]
Nomor 19
[tex]10 \frac{2}{5} + 8 \frac{1}{4} + 3 \frac{7}{8} \\ \\ = \frac{52}{5} + \frac{33}{4} + \frac{31}{8} \\ \\ = \frac{416 + 330 + 155}{40} \\ \\ = \frac{901}{40} \\ \\ = 22 \frac{21}{40} [/tex]
[tex] \\ [/tex]
Nomor 20
[tex]15 \frac{2}{5} + \frac{4}{7} + 10 \frac{1}{2} \\ \\ = \frac{77}{5} + \frac{4}{7} + \frac{21}{2} \\ \\ = \frac{1078 + 40 + 735}{70} \\ \\ = \frac{1853}{70} \\ \\ =26 \frac{33}{70} [/tex]
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