1. (itu 0,5)
[tex]13\frac{1}{2} \div 0.5 \times \frac{24}{27} - 12[/tex]
A. 10
B. 12
C. 24
D. 27
2. (Itu 3,1)
[tex] 2\frac{1}{7} + 1 \frac{2}{3} \times 3.1[/tex]
A.
[tex]7\frac{13}{42} [/tex]
B.
[tex]7\frac{1}{4} [/tex]
C.
[tex] \frac{317}{42} [/tex]
D.
[tex] \frac{370}{42} [/tex]
4. Hasil dari...adalah...(itu 0,6 dan 0,25)
[tex]0.6 + \frac{1}{2} \div ( \frac{2}{3} - 0.25) \times 1 \frac{4}{5} [/tex]
A.
[tex] \frac{138}{25} [/tex]
B.
[tex] \frac{183}{25} [/tex]
C.
[tex]2 \frac{19}{25} [/tex]
D.
[tex]2 \frac{18}{25} [/tex]
4. Pak Yahya memiliki sebidang tanah, 1/4 bagian dari luas tanahnya dibuat kolam ikan, 0,4 bagian dipasang keramik, dan sisanya ditanami rumput. Jika luas tanah yg ditanami rumput 140m², maka luas kolam ikan adalah..
A. 35m²
B. 70m²
C. 87,5m²
D. 100m²
Semuanya hrs dgn cara yaa
[tex]1.\ 13\frac{1}{2} \div 0,5 \times \frac{24}{27} -12\\\\=\frac{(13\times 2)+1}{2} \div \frac{5}{10} \times \frac{24}{27} -12\\\\=\frac{27}{2} \div \frac{1}{2} \times \frac{24}{27} -12\\\\=\frac{27}{2} \times2 \times \frac{24}{27} -12\\\\=27 \times \frac{24}{27} -12\\\\=24-12\\\\=12\\Jawaban : B[/tex]
[tex]2.\ 2\frac{1}{7} +1\frac{2}{3} \times 3,1\\\\=\frac{(2\times 7)+1}{7} +\frac{(1\times 3) +2}{3} \times \frac{31}{10} \\\\=\frac{15}{7} +\frac{5}{3} \times \frac{31}{10} \\\\=\frac{15}{7} +\frac{1}{3} \times \frac{31}{2} \\\\=\frac{15}{7} +\frac{31}{6} \\\\=\frac{(15\times 6)+(31\times 7)}{7\times 6} \\\\=\frac{90+217}{42} \\\\=\frac{307}{42} \\\\=7\frac{13}{42}\\Jawaban : A[/tex]
[tex]3.\ 0,6+\frac{1}{2} \div (\frac{2}{3} -0,25)\times 1\frac{4}{5} \\\\=\frac{6}{10}+\frac{1}{2}\div(\frac{2}{3}-\frac{25}{100})\times\frac{(1\times 5)+4}{5} \\\\=\frac{3}{5}+\frac{1}{2}\div(\frac{2}{3}-\frac{1}{4})\times\frac{9}{5} \\\\=\frac{3}{5}+\frac{1}{2}\div(\frac{(2\times4)-(1\times3)}{3\times4})\times\frac{9}{5} \\\\=\frac{3}{5}+\frac{1}{2}\div\frac{5}{12}\times\frac{9}{5} \\\\=\frac{3}{5}+\frac{1}{2}\times\frac{12}{5}\times\frac{9}{5} \\\\=\frac{3}{5}+\frac{6}{5}\times\frac{9}{5} \\[/tex]
[tex]=\frac{3}{5}+\frac{54}{25}\\\\=\frac{(3\times5)+(54\times1)}{25} \\\\=\frac{69}{25} \\\\=2\frac{19}{25} \\Jawaban : C[/tex]
[tex]4.\ Bagian\ tanah\ yang\ ditanami\ rumput = 1 - (\frac{1}{4} + 0,4)\\\\Bagian\ tanah\ yang\ ditanami\ rumput = 1 - (0,25 + 0,4)\\\\Bagian\ tanah\ yang\ ditanami\ rumput = 1 - (0,65)\\\\Bagian\ tanah\ yang\ ditanami\ rumput = 0,35\\\\\\Luas\ tanah\ yang\ ditanami\ rumput =0,35\times Luas\ tanah\\\\140m^2 =\frac{35}{100} \times Luas\ tanah\\\\ Luas\ tanah=\frac{100}{35}\times 140m^2 \\\\ Luas\ tanah=400m^2[/tex]
[tex]Luas\ kolam\ ikan = \frac{1}{4} \times Luas\ tanah\\\\Luas\ kolam\ ikan = \frac{1}{4} \times 400m^2\\\\Luas\ kolam\ ikan = 100m^2\\Jawaban : D[/tex]
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