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Wisk-Gr 7 - T3-2020_hlayiso.com_.pdf

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Downloaded from hlayiso.com LAER VOLKSKOOL HEIDELBERG VAK: WISKUNDE DATUM: 29 SEPTEMBER 2020 EKSAMINATOR: MEV A. VENTER TYD: 40 MINUTE MODERATOR: MNR J. JORDAAN TOTAAL: 25 PUNTE _____ % 25 ______________________________________________________________________________ NAAM EN VAN: _______________________________________ GRAAD 7: ____ ______________________________________________________________________________ INSTRUKSIES: - Beantwoord alle vrae op die vraestel. - Sterkte! ______________________________________________________________________________ VRAAG 1: GEE EEN PAAR GETALLE WAT DIE VOLGENDE VERGELYKINGS WAAR SAL MAAK [4] 1.1 a + b = 25 a = ____ en b = _____ (2) 1.2 x–y=6 x = ____ en y = _____ (2) ______________________________________________________________________________ VRAAG 2: LOS DIE VERGELYKINGS OP DEUR INSPEKSIE [3] 2.1 23 = x + 13 x = _____ (1) 2.2 x–6=x÷3 x = _____ (2) _____________________________________________________________________________ VRAAG 3: TOON JOU BEWERKINGS [2] Vervang die veranderlikes met ‘n getal tussen 1 en 5 om te sien watter waarde die vergelyking waar sal maak. 8p + 2 = 33 + p – 3 ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ LVH- WISKUNDE-Gr7_Sept 2020 Bladsy 1
Downloaded from hlayiso.com VRAAG 4: [3] 4.1 Xavier wil musiek van Joox op die internet aflaai. Dit kos hom R60 om by Joox aan te sluit en dan R6 vir elke liedjie wat hy aflaai. Skryf ‘n formule om die koste van die musiek af te laai, as C = koste om die musiek af te laai ; n = die aantal liedjies wat afgelaai word. (2) ______________________________________________________________ 4.2 Gebruik jou formule en bepaal hoeveel dit Xavier sal kos om 8 liedjies af te laai. (1) ______________________________________________________________ _____________________________________________________________________________ VRAAG 5: SKRYF ‘N EKWIVALENTE VERGELYKING VIR ELK VAN DIE VOLGENDE. MOENIE DIE VERGELYKINGS OPLOS NIE. [3] 5.1 m x n = 24 _____________________________________ (1) 5.2 u=v–w _____________________________________ (1) 12 5.3 =d _____________________________________ (1) 𝑐 _____________________________________________________________________________ VRAAG 6: SKRYF ‘N VERGELYKING VIR DIE VOLGENDE BEWERINGS. MOENIE DIE VERGELYKINGS OPLOS NIE. [3] 6.1 Die produk van twee getalle is 27. ____________________________ (1) 6.2 ‘n Getal minus 4 gee dieselfde antwoord as die getal gedeel deur 3. ______________________________________________________ (1) 6.3 Die vierkant van ‘n getal is 16. ____________________________ (1) ______________________________________________________________________________ VRAAG 7: SKRYF ELKE UITDRUKKING IN ‘N KORTER VORM [4] 7.1 x+x+x+x+x= ________ (1) 7.3 rxrxrxr = ________ (1) 7.2 5a + 2a = ________ (1) 7.4 3x5xy= ________ (1) _____________________________________________________________________________ LVH- WISKUNDE-Gr7_Sept 2020 Bladsy 2
Downloaded from hlayiso.com VRAAG 8: BEPAAL DIE WAARDES [3] Bepaal die waarde van die volgende uitdrukkings as k = 3, b = -2 en c = 4. 8.1 kc + 4 ________________________________________________________ (1) 8.2 cx5–b ________________________________________________________ (1) 8.3 k+8÷c ________________________________________________________ (1) ______________________________________________________________________________ TOTAAL: [25] LVH- WISKUNDE-Gr7_Sept 2020 Bladsy 3

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