
TES DIAGNOSIK RELASI DAN FUNGSI
Authored by Mellinda Vimala
Mathematics
8th Grade

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
Jika 5 × (-8) + 40 : 2 = y, maka nilai y adalah …
10
-10
-20
Answer explanation
To find the value of x, first calculate 12 × (-4) = -48 and 75 ÷ 3 = 25. Then, -48 + 25 = -23. Therefore, the value of x is -23.
2.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
6 + (-5) x 4 – 7 = …
-21
-3
21
Answer explanation
To solve the expression, follow the order of operations (PEMDAS/BODMAS). First, multiply -5 by 4 to get -20. Then, add 6 to -20 to get -14. Finally, subtract 7 from -14 to get -21. Therefore, the correct answer is -21.
3.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
Bentuk -6x2 – x + 4y variabel-variabelnya adalah ...
-6, -1, dan 4
x2, x, dan y
x + y
Answer explanation
Bentuk -6x^2 - x + 4y memiliki variabel x^2, x, dan y karena terdapat suku dengan pangkat 2 (x^2), suku linier (x), dan suku konstan (y).
4.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
Hasil penjumlahan dari -3a – 6b + 7 dan 13a – (-2b) + 4 adalah …
16a - 8b + 11
10a + 4b + 11
10a - 4b + 11
Answer explanation
To find the sum, combine like terms: -3a + 13a = 10a, -6b - (-2b) = -4b, 7 + 4 = 11. Therefore, the result is 10a - 4b + 11.
5.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
Hasil perkalian dari (4x – 5)(3x + 3) adalah ...
12x2 – 3x – 15
12x2 + 3x - 15
12x2 – 27x - 15
Answer explanation
To find the product of (4x - 5)(3x + 3), apply the distributive property. Multiply each term in the first expression by each term in the second expression. Simplify the result to get 12x^2 - 3x - 15, which is the correct answer choice.
6.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
Kumpulan berikut yang bukan merupakan himpunan adalah …
Kumpulan siswa SMPN 22 Surabaya kelas VIII yang berkacamata
Kumpulan hewan berkaki empat
Kumpulan siswa yang tinggi
Answer explanation
Kumpulan siswa yang tinggi adalah himpunan yang tidak jelas kriteria tingginya, sehingga bukan merupakan himpunan yang terdefinisi dengan baik.
7.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
Apabila A = { x | 1 ≤ x < 13, x Bilangan Prima} maka anggota A adalah …
{1, 3, 5, 7, 11}
{2, 3, 5, 7, 9}
{2, 3, 5, 7, 11}
Answer explanation
The set A consists of prime numbers between 1 and 13, which are 2, 3, 5, 7, and 11. Therefore, the correct answer is {2, 3, 5, 7, 11}.
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