Giúp mik zới m.n ơi .

Đáp án:

Giải thích các bước giải:

h)(2/5)^2+5 và 1/2(4,5-2)+2^3/(-4)

=4/25+11/2(9/2-2)+-8/4

=4/25+11/2(9/2-4/2)+-8/4 

=4/25+11/2x5/2+-8/4

=4/25+55/4+-8/4

=4/25+47/4

=16/100+1175/100

=1191/100

i)1/10-(-1/12)+1/15

=1/10+1/12+1/15

=6/60+5/60+4/60

=15/60=1/4

j)(-1/2)^2:1/4-2(-1/2)^2

=1/4:1/4-2x1/4

=1/4x4/1-2x1/4

=1/4(4-2)

=1/4x2

=2/4=1/2

k)125%(-1/2)^2:(1 và 5/16-1,5)+2008^0

=5/4x1/4:(21/16-3/2)+1

=5/4x1/4:(21/16-24/16)+1

=5/4x1/4:-3/16+1

=5/16:-3/16+1

=5/16x16/-3+1

=-5/3+1

=-5/3+3/3

=-2/3

l)(3-2 và 1/3+1/4):(4-5 và 1/6+2 và 1/4)

=(3-7/3+1/4):(4-31/6+9/4) 

=(36/12-28/12+3/12):(48/12-62/12+27/12)

=11/12:13/12

=11/12x12/13

=11/13

m)18/37+8/24+19/37-1 và23/24 +2/3

=18/37+1/3+19/37-47/24+2/3

=(18/37+19/37)+(1/3+2/3)-47/24

=1+1-47/24

=2-47/24

=48/24-47/24

=1/24

n)(3/8+-3/4+7/12):5/6+1/2

=(9/24+-18/24+14/24):5/6+1/2

=5/24:5/6+1/2

=5/24x6/5+1/2

=1/4+1/2

=1/4+2/4

=3/4

o)(7/8-3/4)1 và1/3- 2/7(3,5)^2

=(7/8-6/8)4/3-2/7(7/2)^2

=1/8x4/3-2/7x49/4

=1/6-7/2

=1/6-21/6

=-20/6=-10/3

p)5/16:0,125-(2 và 1/4-0,6)x10/11

=5/16:1/8-(9/4-3/5)x10/11

=5/16:1/8-(45/20-12/20)x10/11

=5/16:1/8-33/20x10/11

=5/16:1/8-3/2

=5/16x8/1-3/2

=5/2-3/2

=2/2=1

q)1/2+3/4-(3/4-4/5)

=1/2+3/4-3/4+4/5

=(1/2+4/5)+(3/4-3/4)

=(5/10+8/10)+0

=13/10