Reken Maar! 4: werkschrift B - correctiesleutel

Page 52

LES 39 1

Hoofdrekenen: vermenigvuldigen tot 10 000

Los op. Denk aan de maaltafels! a

2

13a-d

3 × 1 000 =

3 000

100 × 50 =

5 000

10 × 172 =

1 720

68 × 100 =

0 × 100 =

0

10 × 431 =

8 × 900 =

7 200

700 × 4 =

2 800

50 × 50 =

50 × 60 =

3 000

8 × 300 =

b

1 000 × 9 =

9 000

6 800

4 × 700 =

2 800

4 310

10 × 600 =

6 000

800 × 5 =

4 000

2 500

9 × 300 =

2 700

2 400

75 × 100 =

7 500

5 000 × 2 = 10 000

Reken uit. Noteer de tussenstapjes en het product. a 5 × 1 200 1 000 200

3 × 512 500 10 2

2 050 × 4 4 × 2 050

= (5 × 1 000) + (5 × 200) = 5 000 + 1 000 = 6 000

= ( 3 × 500) + (3 × 10) + (3 × 2) = 1 500 + 30 + 6 = 1 536

= (4 × 2 000) + (4 × 50) = 8 000 + 200 = 8 200

2 000 50 b 2 × 3 200 3 000 200

1 002 × 4 4 × 1 002

= (2 × 3 000) + (2 × 200) = 6 000 + 400 = 6 400

= (4 × 1 000) + (4 × 2) = 4 000 + 8 = 4 008

1 000 2 9 × 215 200 10 5 52

= (9 × 200) + (9 × 10) + (9 × 5) = 1 800 + 90 + 45 = 1 935

c


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