Question

Calculați, folosind scoaterea unui factor comun 35*349+35*251 64*329+64*505 42*504-239*42 47*108+47*295 55*620-436*55 846*75-609*75

Answer 1

35 x 349+35 x2 51=35 x ( 349 + 251)=35 x 600 = 21 000

64 x 329 + 64 x 505 = 64 x ( 329 + 505) =64 x 834=53 376

42 x 504 - 239 x 42 = 42 x (504 - 239)= 42 x 265=11 130

47 x 108 + 47 x 295 = 47 x ( 108 + 295) =47 x 403 =18 941

55 x 620 - 436 x 55 = 55 x ( 620 - 436) =55 x 184= 10 120
 
846 x 75 - 609 x 75 = 75 x ( 846 - 609) =75 x 237=17 775