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3 cijfers X 3 cijfers met hulp [2]

3 cijfers X 3 cijfers met hulp [2]

 
1 8 4
2 9 6 ×
6 × 4 = 2 4
6 × 80 = 4 8 0
6 × 100 = 6 0 0
90 × 4 =
360
90 × 80 =
7200
90 × 100 =
9000
200 × 4 =
800
200 × 80 =
16000
200 × 100 =
+ 20000
54464