1. 563 x (2+3) = 2.815
563 x 5 = 2.815
2. (276 + 456) x 7 = 5.124
732 x 7 = 5.124
3. 421 x (9 - 3) = 2.526
421 x 6 = 2.526
4. 5 x (642 - 238) = 2.020
5 x 404 = 2.020
5. (321 + 247) x 9 = 5.112
568 x 9 = 5.112
6. (213 - 114) x 100 = 9.900
99 x 100 = 9.900.
Succes! :D
