Summary
Samenvattingen kennisbasis rekenen Pabo
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Een samenvatting over de kennisbasis rekenen van de Pabo die in leerjaar 3 wordt getoetst. Alle onderdelen van de toets komen in deze samenvatting kort aan bod.
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Samenvatting Rekenen Kennisbasis toetsEigenschappen van bewerkingen:
Communicatieve eigenschap (wissel)
2+3=3+2
Associatieve eigenschap (haakjes)
2+(3+4)=(2+3)+4
2x(3x4)=(2x3)x4
Distributieve eigenschap (splitsen/verdelen)
2x(3+4)=(2x3)+(2x4)
De ‘twee maal’ verdelen over de twee getallen
Compenseren (verheffen, goedmaken, mooie ronde getallen zoeken)
302 – 90
300 – 90 = 210
210 + 2 = 212
Groter en Kleiner (GEK)
28 x 2,5 = 7 x 10
: 4 en x 4
Groter of Kleiner (GOK DEELSOMMEN!)
3 : 2,5 = 12 : 10
X 4 en x 4
Romeinse cijfers:
M (ille) 1000
D (emi) 500
C (ent) 100
L 50
X 10
V (ijf) 5
I 1
Maximaal 3 dezelfde letters achter elkaar!!!
Eraf = ervoor plaatsen!!!
Binaire getallen:
10 tot de macht 3 = 10 x 10 x 10
10 tot de macht 2 = 10 x 10
10 tot de macht 1 = 10
10 tot de macht 0 = 1
10 tallige stelsel = 0 1 2 3 4 5 6 7 8 9 10
, 2 tallige stelsel = 0 1
Ezelsbruggetje van het tweetallig stelstel naar tientallig stelsel:
64 32 16 8 4 2 1
1 0 0 1 0 1 0
64 + 8 + 2 = 74
218 omzetten naar binair getal
256 128 64 32 16 8 4 2 1
0 1 1 0 1 1 0 1 0
218 – 128 = 90
90 – 64 = 26
26 – 16 = 10
10 – 8 = 2
2–2=0
Dus 11011010 is het binair getal van 218
Hexidecimale getallen:
A 10
B 11
C 12
D 13
E 14
F 15
0123456789ABCDEF
Van heximaal getal naar decimaal getal 1AD
Begin altijd achteraan!
13 + (10 x 16) + (1 x 256) = 13 + 160 + 256 = 429
Van decimaal getal naar heximaal getal 20
256 16 1
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