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3 cijfers X 3 cijfers met hulp [2]

3 cijfers X 3 cijfers met hulp [2]

 
1 9 8
1 3 8 ×
8 × 8 = 6 4
8 × 90 = 7 2 0
8 × 100 = 8 0 0
30 × 8 =
240
30 × 90 =
2700
30 × 100 =
3000
100 × 8 =
800
100 × 90 =
9000
100 × 100 =
+ 10000
27324