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N2.1 - Optellen van tientallen

Set met flashcards gericht op het automatiseren van het optellen van tientallen. Voorbeeldsommen: 40 + 30 = ... , 70 + 20 = ... .

60 + 30 = ...

Front

90

Back

10 + 30 = ...

Front

40

Back

20 + 20 = ...

Front

40

Back

10 + 50 = ...

Front

60

Back

30 + 40 = ...

Front

70

Back

10 + 70 = ...

Front

80

Back

20 + 60 = ...

Front

80

Back

50 + 20 = ...

Front

70

Back

10 + 40 = ...

Front

50

Back

20 + 70 = ...

Front

90

Back

30 + 30 = ...

Front

60

Back

10 + 60 = ...

Front

70

Back

40 + 40 = ...

Front

80

Back

70 + 20 = ...

Front

90

Back

50 + 40 = ...

Front

90

Back

10 + 80 = ...

Front

90

Back

30 + 50 = ...

Front

80

Back

20 + 50 = ...

Front

70

Back

60 + 20 = ...

Front

80

Back

40 + 30 = ...

Front

70

Back