Question

1) Bỏ dấu ngoặc rồi tính:

a) (38 - 29 +43) - (43+38)

b) 271-[(-43) + 271-(-17)]

c) (-11)^2 . 3-[3-(-50).(-4)]

d)4.5^2 +81.3^2-(13-4)^2

Answer 1

a, (38 - 29 + 43) - (43 + 38)
= 38 - 29 + 43 - 43 - 38
= (38 - 38) + (43 - 43) - 29
= -29
b, 271 - [(-43) + 271 - (-17)]
= 271 - (-43 + 271 + 17)
= 271 + 43 - 271 - 17
= (271 - 271) + (43 - 17)
= 26
@Dương Taurus

Answer 2

c, (-11)².3 - [3 - (-50).(-4)]
= 121.3 - [(3 + 50.(-4)]
= 363 - 3 + 200
= 560
d, 4.5² + 81.3² - (13 - 4)²
= 4.25 + 81.9 - 13² + 4²
= 100 + 729 - 169 + 16
= 676
@Dương Taurus