va rog repede va rog din suflet vă rog

Răspuns:
1)53×18+18×49=954+882=1836
2)18×(53+49)
=18×102
=1836
1)378×26-279×26=2574
378×26=9828
279×26=7254
9828-7254=2574
2)378×26-279×26
378×26-7254
9828-7254
2574