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3 cijfers X 3 cijfers met hulp [2]

3 cijfers X 3 cijfers met hulp [2]

 
1 5 5
3 3 3 ×
3 × 5 = 1 5
3 × 50 = 1 5 0
3 × 100 = 3 0 0
30 × 5 =
150
30 × 50 =
1500
30 × 100 =
3000
300 × 5 =
1500
300 × 50 =
15000
300 × 100 =
+ 30000
51615