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Les 6

Huiswerk Oplossings. Les 6. Merk exercise 1.6 pg 16. 1a) 15 = 3 x 5 20 = 2 x 2 x 5 GGF = 5 15 : 20 ( Deel elke kant deur 5 ) 3 : 4 1b) 200 = 2 x 2 x 2 x 5 x 5 180 = 2 x 2 x 3 x 3 x 5 GGF = 2 x 2 x 5 = 20

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Les 6

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  1. HuiswerkOplossings Les 6

  2. Merkexercise 1.6 pg 16 1a) 15 = 3 x 5 20 = 2 x 2 x 5 GGF= 5 15 : 20 (Deelelkekantdeur 5) 3 : 4 1b) 200 = 2 x 2 x 2 x 5 x 5 180 = 2 x 2 x 3 x 3 x 5 GGF= 2 x 2 x 5 = 20 200 : 180 (Deelelkekantdeur 20) 10 : 9

  3. Mark exercise 1.6 pg 16 1c) 7 = 7 21 = 3 x 7 35 = 5 x 7 GGF = 7 7:21:35 (Deelelkekantdeur 7) 1:3:5 1d) 102 = 2 x 3 x 17 99 = 3 x 3 x 11 87 = 3 x 29 GGF= 3 102:99:87 (Deelelkekantdeur 3) 34:33:29

  4. Merkexercise 1.6 pg 16 1e) 75m = 7 500 cm 7 500 = 2 x 2 x 3 x 5 x 5 x 5 x 5 125 = 5 x 5 x 5 GGF= 5 x 5 x 5 7 500 : 125 (Deelelkekantdeur 125) 60 : 1 1f) 9 = 3 x 3 600 sek= 10 min = 2 x 5 9 : 10 aangesiengeen GGF

  5. Merkexercise 1.6 pg 16 2a) R48 / 4 dosyn= R12 / dosyn(Deelbeidekantedeur4) 2b) 3 piesangs/ 90 sek= 3 piesangs/ 1.5 min = 2 piesangs/ min (Deelbeidekantedeur 1.5) 2c) 616 km / 56 l = 11 km / l (Deelbeidekantedeur 56) 2d) 150 cm / 2 ure= 150 cm / 120 min = 1,25 cm / min (Deelbeidekantedeur 120)

  6. Merkexercise 1.6 pg 16 3) 1 m / s = 60 m / min = 3 600 m / uur= 3,6 km / uur> 1 km / uur 4a) 35 min / 2 cm = 17,5 min / cm 4b) 2 * 10 mm / 35 min = 20 mm / 35 min = 4/7 mm / min (Deelbeidekantedeur 5) 4c) 160 cm / 2 cm = 80 dus is80 x 35 min = 2 800 min = 46,666 ure, maar0,666 * 60 = 40 daarom46 ure40 min

  7. Merkexercise 1.6 pg 16 5) 70 x 60 x 24 = 100 800 kloppe per dag 6) R35 / kg => 25 kg = R35 x 25 = R875 7) R575 / 5 l => 15 l = R575 x 3 = R1 725 8) Spoed= afstand/ tyd= 54 km / 3 ure= 18 km / uur (Deelbeidekantedeur 3) 10a) Spoed= afstand/ tyd= 50 km / 0.5 ure= 100 km / uur (Vermenigvuldigbeidekante met 2) 10b) Afstand= spoedx tyd= 80 km / h x 2 h = 160 km 10c) Tyd= afstand/ spoed= 330 km / 110 km / h = 3 ure

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