1)...=135+65+360+40+24=200+400+24=624

2)...=(8.125).(4.25)=1000.100=100000

4)...= (467+433)+(238+762)+3465=990+1000+3465=5455

5)...=129.(172-73+1)=129.100=12900

6)...=205-(1200-(16-6)³):40=205-(1200-1000):40=205-200:40=205-5=200

Trả lời chi tiết giúp mình đc ko

467 + 238 + 533 + 762 + 3465

= ( 467 + 533 ) + ( 762 + 238 ) + 3465

=          1000     +          1000   + 3465

= 1000 x 2 + 3465

= 5465

467+238+533+762+3465

=(467+533) + (238+762) + 3465

=1000+1000+3465

=2000+3465

=5465

tk nhé

467 + 238 + 533 + 762 + 3465

= ( 467 + 533 ) + ( 238 + 762 ) + 3465

=    1000       +       1000      +       3465

=            2000         +        3465

=                    5465

\(...=25x4x\left(7x3+3x4x5+2\right)=100x\left(21+120+2\right)=100x143=14300\)

14300

14300

7 x 12 x25 +3 x 16 x125 +8 x25

=7 x4 x3 x25 +3 x4 x4 x5 x25+4x2x25

=(4 x25) x(7 x3 +3 x4 x5 +2)

= 100 x (21 +60 +2)

= 100 x 83

= 8300

4:

a: =4/15-2,9+11/15=1-2,9=-1,9

b: \(=-36,75+3,7-63,25+6,3=10-100=-90\)

c: \(=6,5+3,5-\dfrac{10}{17}-\dfrac{7}{17}=10-1=9\)

d: \(=\dfrac{13}{25}\left(-39,1-60,9\right)=\dfrac{13}{25}\left(-100\right)=-52\)

e: =-5/12-7/12-3,7-6,3=-1-10=-11

f: =2,8(-6/13-7/13)-7,2=-2,8-7,2=-10

cậu tách ra từng bài thôi nha.

rối tùm lum 

chả hiểu cái gì lun

6/11

**** nhá kha duy tram

\(\left(\frac{1}{4}-1\right)\left(\frac{1}{9}-1\right)....\left(\frac{1}{121}-1\right)=-\frac{3}{4}.-\frac{8}{9}....-\frac{120}{121}=\frac{-1.3}{2.2}\cdot\frac{-2.4}{3.3}....-\frac{10.12}{11.11}=\frac{-1}{2}.-\frac{12}{11}=\frac{6}{11}\)