Question

[Trần Nguyễn Xuân Khôi]

tinh nhanh
3) (187 -23) – (20 – 180)

4) (-37 – 17). (-9) + 35. (-9 – 11)

5) (-50 +19 +143) – (-79 + 25 + 48)

6) (-8).25.(-2). 4. (-5).125

7) 3784 + 23 – 3785 – 15

Answer 1

[Nguyễn Lê Phước Thịnh]

7: =-1+8=7

6: \(=-\left(8\cdot125\right)\cdot\left(2\cdot5\right)\cdot\left(25\cdot4\right)=-1000000\)

5: =-50+19+143+79-25-48

=-75+98+95

=23+95

=118

4: =37x9+17x9-35x9-35x11

=18+153-385

=-214