bai 1,tinh hop li
1, 3.10 . 15 - 6 . 5 .25
2, 37(-15 - 8) - 15 ( 36-8))
3, - 47 . ( -12) - ( - 12 ) (+54) -12
4, -43(12-80)-80( 43 + 12 |)
5, -24(-3-7)-7(-24-3)
giup minh nhanh nhe
thank you ban nhiu
mai co cham rui
tick ai dau tien . Ke ca sai hay dung
1.
3.10.15 - 6.5.25
= 30.15 - 30.25
= 30.(15 - 25)
= 30.(-10)
= -300
3 . 10 . 15 - 6 . 5 . 25
= 30 . 15 - 30 . 25
= 30 . (15 - 25)
= 30 . (-10)
= -300