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3 cijfers X 3 cijfers met hulp [2]

3 cijfers X 3 cijfers met hulp [2]

 
2 1 7
1 1 2 ×
2 × 7 = 1 4
2 × 10 = 2 0
2 × 200 = 4 0 0
10 × 7 =
70
10 × 10 =
100
10 × 200 =
2000
100 × 7 =
700
100 × 10 =
1000
100 × 200 =
+ 20000
24304