Question

 de bai;ap dung nhan 1 so voi 1 hieu

57*9

753*99

62*49

53*29

217*11

413*21

413*19

217*19

giup minh nha ai nhanh minh tick cho

Answer 1

753*99 = 753*( 100 - 1 ) 

62*49 = 62*( 50 - 1 )

53*29 = 53*( 30 -1 )

217*11 = 217*( 20 - 9 )

413*21 = 413*(30 -9 )

413*19 = 413*( 20 - 1 )

217*19 = 217*( 20 - 1)

Answer 2

57*9=50*9+7*9

753*99=753*90+753*9

62*49=60*49+2*49

53*29=50*29+3*29

217*11=217*10+217*1

413*21=413*20+413*1

413*19=413*10+413*9

217*19=217*10+217*9

Answer 3

la hieu nha ban nguyen dieu linh

Answer 4

50*0 + 7*9 = 57*9