Soal pengayaan MTK 1
Quiz
•
Mathematics
•
9th Grade
•
Medium
Ari Prabowo, S.Pd
Used 1+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
10 mins • 10 pts
Hasil Dari (-12)x3-18:(-3) adalah......
-42
-30
-18
18
2.
MULTIPLE CHOICE QUESTION
10 mins • 10 pts
Hasil dari 52/7-2¼:3½ adalah.....
33/14
39/14
43/14
49/14
3.
MULTIPLE CHOICE QUESTION
10 mins • 10 pts
hasil dari 2-3x2-2=......
-32
-2
1/64
1/2
4.
MULTIPLE CHOICE QUESTION
10 mins • 10 pts
Hasil dari 3√7 x √8 + 5√14 adalah....
Answer explanation
Hasil dari 3√7 x √8 + 5√14
= 3√56 + 5√14
= 3 x √(4x14) + 5√14
= 3 x √4 x √14 + 5√14
= 3 x 2 x √14 + 5√14
= 6√14 + 5√14
= 11√14
5.
MULTIPLE CHOICE QUESTION
10 mins • 10 pts
Pada tes kemampuan matematika, skor total ditentukan dengan aturan: skor 4 untuk jawaban benar, skor -2 untuk jawaban salah, dan skor -1 untuk soal tidak dijawab. Dari 50 soal yang diberikan, Amir hanya menjawab 48 soal dan memperoleh skor 100. Banyak soal yang dijawab Amir dengan benar adalah.....
Answer explanation
B + S = 48 .... (persamaan 1)
Skor TOTAL
4B - 2S + 2(-1) = 100
4B - 2S - 2 = 100
4B - 2S = 100 + 2
4B - 2S = 102 .... (persamaan 2)
Substitusi persamaan 1 dan 2
4B - 2S = 102 | ×1 | 4B - 2S = 102
B + S = 48 | ×1 | 4B + 4S = 192
-------------------- (-)
- 6S = -90
S = 15 cm
Soal dijawab benar
B + S = 48
B = 48 - 15
B = 33
6.
MULTIPLE CHOICE QUESTION
10 mins • 10 pts
Diketahui rumus suku ke-n suatu barisan adalah Un = 10n + 3. Hasil penjumlahan nilai suku ke-22 dan ke-24 adalah....
Answer explanation
Jumlah = U₂₂ + U₂₄
= (10 × 22 + 3) + (10 × 24 + 3)
= 223 + 243
= 466
7.
MULTIPLE CHOICE QUESTION
10 mins • 10 pts
Ani menabung sebesar Rp 800.000,00 pada sebuah bank yang memberikan suku bunga tunggal sebesar 16% pertahun. Pada saat diambil, tabungan Ani menjadi Rp 992.000,00. Lama Ani menabung adalah.... bulan
32
Answer explanation
Total Bunga= Lama menabung (bulan) x persentase bunga per bulan x tabungan awal
Sehingga untuk mengetahui lama menabung Ani diketahui:
Tabungan Awal = 800.000
Tabungan Akhir = 992.000
Bunga = Tabungan Akhir - Tabungan Awal = 992.000 - 800.000 = 192.000
Jumlah bunga per bulan yang diberikan adalah 16/12 % = 4/3 %.
Maka, lama menabung Ani:
Total Bunga = Lama menabung (bulan) x persentase bunga per bulan x tabungan awal
192.000 = Lama menabung (bulan) x 4/3% x 800.000
192.000 = Lama menabung (bulan) x 4/3 x 1/100 x 800.000
192.000 = Lama menabung (bulan) 4/3 x 8.000
Lama menabung: 192.000/8.000 x 4/3 = 32 bulan
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