inoefening bewerkingen:
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a:Reken handig: je mag je werkwijze noteren
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17,03 x 100 =___________________________________________________=
483x20=_______________________________________________________=
284 : 20 =______________________________________________________=
3/4 + 2/6=______________________________________________________=
7/8 - 2/4 =______________________________________________________=
785 - 298=_____________________________________________________-=
1768 + 497=____________________________________________________=
14 : 1000=______________________________________________________=
80 x 250=______________________________________________________=
700 : 500=______________________________________________________=
Los de volgende cijferoefeningen op :
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a: 48,7 x 2,9= _________
b: 3897 : 48 =_________(tot 0,1 nauwkeurig)
c: 298 x 63,4=_________
d: 2987,6 + 89,7 + 987,78 =________
e: 987234 - 97056,1 =_________
______________________________________________________________________
1:Omkring de juiste schatting
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307 x 2,3 is ongeveer 90 900 60 600 6000
400 000 : 395 is ongeveer 20 200 2000 100 1000
2:Werk uit, je mag tussenuitkomsten noteren:
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20 x 17 =_______________________________________________________
3 : 10 =_________________________________________________________
0, 5 x 44=_______________________________________________________
0,6 x 9 =________________________________________________________
10x35,35 =______________________________________________________
6,4 x 5 =________________________________________________________
25%van 120 =___________________________________________________
1935 - 398 = ____________________________________________________
6,3 - 2,24 = _____________________________________________________
8,15 - 4,2 =_____________________________________________________
3 - 0,75 = ______________________________________________________
5 x (53 + 167 ) =_________________________________________________
2 % van 500=__________________________________________________
3: Zet de deling om in de meest eenvoudige vorm(werk daarvoor de nullen en kommas weg in de deler
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470 : 230 =_________________:_________________
25,5 : 0,5 = _________________:_________________
625 : 2,5 =__________________: 25
4:Vul in:
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125 : 5 = ( 100 : 5 ) + ( _____: 5 )
2400 : 6 = 1200 : ______
3600 : 9 =_______: 3
380 : 10 = _________: 5
5:Zoek het rekenvoordeel, schik de oefening en los op
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3217 + 6 87 + 2783= ____________________________________________=____________
1435 - 670 - 330 =______________________________________________=_____________
6:Vul in:
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3/7 van de helft van 140 is__________
312 meer dan het tienvoud van 12 is_________
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10-11-2005, 00:00
Geschreven door Walter Segers 
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