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3 cijfers X 3 cijfers met hulp [1]

3 cijfers X 3 cijfers met hulp [1]

 
3 7 4
2 2 3 ×
3 × 4 = 1 2
3 × 70 = 2 1 0
3 × 300 = 9 0 0
20 × 4 = 8 0
20 × 70 = 1 4 0 0
20 × 300 = 6 0 0 0
200 × 4 =
800
200 × 70 =
14000
200 × 300 =
+ 60000
83402