Question

[Hà Trâm Anh]

Thực hiện các phép tính 

a) 17 . 85 + 15 .17 - 120

b) 100 : [30 -(6-1)² ] 

c) |-10| +4+3.2³ +(-14)

d) 20-[30-(5-1)² :2]

e) 80-(4.5² -3.2³)

g) 35-{ 12-[-14+(-2)]}

Ai nhanh mình tick nha cố lên

Answer 1

[Nguyễn Thị Thái Hằng]

a)17.85-15.17-120

=17.(85-17)-120

 =17.68-12

=1156-120

=1036

b)100:[30-(6-1)^ 2]

=100 :[30-5^ 2]

= 100:[30-25]

=100:5=20

c)/-10/+4+3.2^3+(-14)

=10+4+3.8 +(-14)

=14+24+(-14)

=[14 +(-14)]+24

=0+24=24

d)20-[30-(5-1)^ 2: 2]

=20-[30-4^2:2]

=20-[30-8]

=20-22=-2

e)80-(4.5^2-3.2^3)

= 80-(4.25-3.8)

=80-(4.25-3.2.4)

=80-4.(25-3.2)

= 80-4.19

= 80-76=4

g)35-{12-[-14+6-2)]}

=35 -{12-14-6+2}

=35-12+14+6-2

=23+14+6-2

=37+6-2

=43-2=41