Question

Bài 8: Tính

1/ (-6 – 25). (-6 + 2)

2/ (7. 3 – 9) : (-6)

3/ (-5 +1 9) . (-4)

4/ 872 : (-6. 2 + 4)

5/ -3. 7 – 4. (-5) + 19

6/ 18 – 10 : (+2) – 71

7/ 115 : (-5).(-3) – 8

8/ (6. 8 – 20 : 5) + 3. (-7)

Answer 1

1/(-6-25).(-6+2)

=-31.(-4)

=-124

2/(7.3-9):(-6+2)

=12:(-4)

=-3

3/(-5+19).(-4)

=14.(-4)

=-56

4/872:(-6.2+4)

=872:(-8)

=-109

5/-3.7-4.(-5)+19

=-21-(-20)+19

=-1+19

=18

6/18-10:2-71

=18-5-71

=13-71

=-58

7/115:(-5).(-3)-8

=-23.(-3)-8

=69-8

=61

8/(6.8-20:5)+3.(-7)

=44+3.(-7)

=44+(-21)

=23