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3 cijfers X 3 cijfers met hulp [1]

3 cijfers X 3 cijfers met hulp [1]

 
2 4 2
3 7 9 ×
9 × 2 = 1 8
9 × 40 = 3 6 0
9 × 200 = 1 8 0 0
70 × 2 = 1 4 0
70 × 40 = 2 8 0 0
70 × 200 = 1 4 0 0 0
300 × 2 =
600
300 × 40 =
12000
300 × 200 =
+ 60000
91718