Terug

3 cijfers X 3 cijfers met hulp [1]

3 cijfers X 3 cijfers met hulp [1]

 
1 9 0
1 2 5 ×
5 × 0 = 0
5 × 90 = 4 5 0
5 × 100 = 5 0 0
20 × 0 = 0
20 × 90 = 1 8 0 0
20 × 100 = 2 0 0 0
100 × 0 =
0
100 × 90 =
9000
100 × 100 =
+ 10000
23750