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7. 1/7+1/2+2/3= 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

Berikut ini adalah pertanyaan dari noah1842038 pada mata pelajaran Matematika untuk jenjang Sekolah Dasar

7. 1/7+1/2+2/3=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=

Jawaban dan Penjelasan

Berikut ini adalah pilihan jawaban terbaik dari pertanyaan diatas.

Nomor 7

\frac{1}{7} + \frac{1}{2} + \frac{2}{3} \\ \\ = \frac{6 + 21 + 28}{42} \\ \\ = \frac{55}{42} \\ \\ = 1 \frac{13}{42}

\\

Nomor 8

\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}

\\

Nomor 9

\frac{3}{8} + \frac{1}{2} + \frac{2}{5} \\ \\ = \frac{15 + 20 + 16}{40} \\ \\ = \frac{51}{40} \\ \\ = 1 \frac{11}{40}

\\

Nomor 10

\frac{3}{4} + \frac{4}{5} + \frac{3}{10} \\ \\ = \frac{15 + 16 + 6}{20} \\ \\ = \frac{37}{20} \\ \\ = 1 \frac{17}{20}

\\

Nomor 11

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}

\\

Nomor 12

\frac{7}{8} + 2 \frac{3}{4} \\ \\ = \frac{7}{8} + \frac{11}{4} \\ \\ = \frac{7 + 22}{8} \\ \\ = \frac{29}{8} \\ \\ = 3 \frac{5}{8}

\\

Nomor 13

4 \frac{2}{5} + \frac{3}{7} \\ \\ = \frac{22}{5} + \frac{3}{7} \\ \\ = \frac{154 + 15}{35} \\ \\ = \frac{169}{35} \\ \\ = 4\frac{29}{35}

\\

Nomor 14

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}

\\

Nomor 15

3 \frac{3}{5} + \frac{1}{4} \\ \\ = \frac{18}{5} + \frac{1}{4} \\ \\ = \frac{72 + 5}{20} \\ \\ = \frac{77}{20} \\ \\ =3 \frac{17}{20}

\\

Nomor 16

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}

\\

Nomor 17

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}

\\

Nomor 18

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}

\\

Nomor 19

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}

\\

Nomor 20

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}

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Last Update: Sat, 29 Oct 22
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