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3 cijfers X 2 cijfers met hulp [2]

3 cijfers X 2 cijfers met hulp [2]

 
4 9 6
4 7 ×
7 × 6 =
42
7 × 90 =
630
7 × 400 =
2800
40 × 6 =
240
40 × 90 =
3600
40 × 400 =
+ 16000
23312