Question

37*28+42*37-42*15 sa se calculeze cu factor comun

Answer 1

37*28+42*37-42*15 =
1 036+42×(37-15)=
1 036+42×22=
1 036+924=
1 960


sau......

37*28+42*37-42*15 =
37×(28+42)-630=
37×70-630=
2 590-630=
1 960