Terug

2 cijfers X 2 cijfers met hulp [1]

2 cijfers X 2 cijfers met hulp [1]

 
4 7
4 3 ×
3 × 7 = 2 1
3 × 40 = 1 2 0
40 × 7 =
280
40 × 40 =
+ 1600
2021