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Summary 3RD GRADE MATH PRACTICE EXAM (BASIC LEVEL) 2026-27

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3RD GRADE MATH PRACTICE EXAM (BASIC LEVEL) 2026-27

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1


OEFENEXAMEN WISKUNDE 3E GRAAD DO
(BASISNIVEAU) 2026-27
Instructies: Beantwoord elke vraag en lees de rationale om te
begrijpen waarom het antwoord correct is.


1–50 Wiskunde Oefenvragen
1. Los op: 𝟐𝒙 + 𝟓 = 𝟏𝟑
A. 4
B. 3
C. 5
D. 6
Antwoord: A (x = 4)
Rationale: 2𝑥 = 13 − 5 = 8 → 𝑥 = 4


2. Ontbind: 𝒙𝟐 + 𝟕𝒙 + 𝟏𝟐
A. (𝑥 + 3)(𝑥 + 4)
B. (𝑥 + 2)(𝑥 + 5)
C. (𝑥 + 1)(𝑥 + 12)
D. (𝑥 + 6)(𝑥 + 2)

,2


Antwoord: A
Rationale: Twee getallen optellen tot 7 en vermenigvuldigen tot
12 → 3 en 4.


3. Bereken oppervlakte driehoek: basis = 10 cm, hoogte = 6 cm
A. 60 cm²
B. 30 cm²
C. 16 cm²
D. 20 cm²
Antwoord: B
𝑏⋅ℎ 10⋅6
Rationale: 𝐴 = = = 30
2 2



4. Los op: 𝟓𝒙 − 𝟕 = 𝟏𝟖
A. x = 5
B. x = 4
C. x = 6
D. x = 7
Antwoord: C
Rationale: 5𝑥 = 25 → 𝑥 = 5(foutcontrole: 5x -7=18 → correct).
Correct antwoord: x=5
Rationale: 5𝑥 − 7 = 18 → 5𝑥 = 25 → 𝑥 = 5

,3


5. Los op 𝒙𝟐 − 𝟓𝒙 + 𝟔 = 𝟎
A. x = 2,3
B. x = -2,-3
C. x = 1,6
D. x = -1,-6
Antwoord: A
Rationale: Factoriseer: 𝑥 2 − 5𝑥 + 6 = (𝑥 − 2)(𝑥 − 3) → 𝑥 =
2of 𝑥 = 3


6. Bereken de schuine zijde van een rechthoekige driehoek:
zijden 6 cm en 8 cm
A. 10 cm
B. 12 cm
C. 14 cm
D. 9 cm
Antwoord: A
Rationale: Pythagoras: 𝑐 2 = 62 + 82 = 36 + 64 = 100 → 𝑐 =
10


𝟑 𝟏
7. Los op: 𝟒 + 𝟔

, 4

11
A. 12
9
B. 10
5
C. 12
7
D. 12

Antwoord: A
Rationale: Gelijknamig maken: 3/4 = 9/12,1/6 = 2/12 →
9/12 + 2/12 = 11/12


8. Bereken 15% van 120
A. 18
B. 20
C. 15
D. 12
Antwoord: A
Rationale: 0,15 × 120 = 18


9. Gemiddelde van: 4, 7, 9, 6, 4
A. 6
B. 5
C. 7
D. 6,5

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Uploaded on
February 18, 2026
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