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3 cijfers X 3 cijfers met hulp [3]

3 cijfers X 3 cijfers met hulp [3]

 
9 1 3
7 8 0 ×
0 × 3 =
0
0 × 10 =
0
0 × 900 =
0
80 × 3 =
240
80 × 10 =
800
80 × 900 =
72000
700 × 3 =
2100
700 × 10 =
7000
700 × 900 =
+ 630000
712140