KELAS : 7
KAK MOHON BANTUAN NYA BESOK MAU DI KUMPULKAN SAYA BUTUH BANGET TERIMAKASIH YANG SUDAH MAU MEMBANTU ^^
Penjelasan dengan langkah-langkah:
3).
[tex]a). - \frac{11}{20} + \frac{7}{20} \\ = \frac{ - 11 +7 }{20} \\ = - \frac{4}{20} [/tex]
[tex]b). \frac{13}{15} - ( - \frac{3}{15} ) \\ = \frac{13}{15} + \frac{3}{15} \\ = \frac{13 + 3}{15} \\ = \frac{16}{15} \\ = 1\frac{1}{15} [/tex]
[tex]c).8 \frac{15}{18} + ( - 4 \frac{7}{18} ) - 2 \frac{11}{18} - ( - \frac{13}{18} ) \\ = 8 \frac{15}{18 } - 4 \frac{7}{18} - 2 \frac{11}{18} + \frac{13}{18} \\ = 8 - 4 - 2( \frac{15 - 7 - 11 + 13}{18} ) \\ = 2 \frac{10}{18} \\ = 2 \frac{5}{9} [/tex]
[tex]d).( - \frac{1}{2} + \frac{1}{3} ) + ( \frac{1}{4} + ( - \frac{1}{3} )) + ( - \frac{1}{20} ) \\ = ( - \frac{3}{6} + \frac{2}{6} ) + ( \frac{3}{12} - \frac{4}{12} ) - \frac{1}{20} \\ = - \frac{1}{6} - \frac{1}{12} - \frac{1}{20} \\ = - \frac{3}{12} - \frac{1}{20} \\ = - \frac{15}{60} - \frac{3}{60} \\ = - \frac{18}{60} \div \frac{6}{6} \\ = - \frac{3}{10} [/tex]
4). 1 Kg Gula = ×2 1 Liter Beras
1 Kg Gula = 2/3 1 Kg Tepung
Dit : 1 Kg Tepung(18.000) = 1 Liter Beras
Jawab : Kg Tepung Ke Kg Gula
[tex]18.000 \div \frac{2}{3} \\ = 18.000 \times \frac{3}{2} \\ = 27.000 \: kg \: gula[/tex]
Kg Gula Ke Liter Beras
[tex]27.000 \times 2 \\ = 54.000 \: liter \: beras[/tex]
5).
a.
Uang Jajan Adik
[tex]60.000 \times \frac{4}{15} \\ = 16.000[/tex]
Uang Jajan Kakak
[tex]60.000 - 16.000 \\ = 44.000[/tex]
b.
[tex]44.000 \times \frac{30}{100} \\ = 44.000 \times \frac{3}{10} \\ = \frac{132.000}{10} \\ = 13.200[/tex]
Maka
44.000 - 13.200
=30.800
Sisa Uang Kakak Adalah Rp. 30.800
Maaf Ya Kalo Ga Jelas
