a) 6/11 : 3/22 x 3/8
b) 33/23 : 44/69 : 27/16
c) 31x14x63 / 21x62x35
giải cả ra cho mik nha
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b, -418 - {- 418 - [ -418 - (-418) + 2021]}
= -481 - { -418 - [ 0 + 2021]}
= -481 + 418 + 2021
= 2021
d, 23 - 501 - 343 + 61 - 257 + 16 - 499
= (23 + 61 + 16) - (501 + 499) - (343 + 257)
= 100 - 1000 - 600
= 100 - 1600
= -1500
e, 743 - 231 + (-495) - (-69) - 38 + (-117)
= 512 - 426 - 155
= 86 - 155
= - 69
1) 2155-(174+2155)+(-68+174-7)-1911-(1234-1911)
=2155-174-2155+(-68)+174-7-1911-1234+1911
=(2155-2155)+(174-174)+(1911-1911)-(68+7+1234)
= 0 + 0 + 0 - 1309
= -1309
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+47+48+49+50=1275
a ) 23/33 > 22/33 = 2/3 = 6/9 > 6/71
Vậy ta có 6/71 ; 2/3 ; 23/33
b ) 1/2 = 4/8 ; 3/4 = 6/8
Vậy ta có 1/2 ; 5/8 ; 3/4
c ) 8/9 > 8 / 11 ; 8/9 > 9/11 ; 9/11 > 8/11
Vậy ta có 8/11 ; 9/11 ; 8/9
\(\dfrac{6}{11}\) : \(\dfrac{3}{22}\) x \(\dfrac{3}{8}\)
= \(\dfrac{6}{11}\) x \(\dfrac{22}{3}\) x \(\dfrac{3}{8}\)
= \(\dfrac{3}{2}\)
\(\dfrac{33}{23}\) : \(\dfrac{44}{69}\): \(\dfrac{27}{16}\)
= \(\dfrac{33}{23}\) x \(\dfrac{69}{44}\)x \(\dfrac{16}{27}\)
= \(\dfrac{4}{3}\)
\(\dfrac{31\times14\times63}{21\times62\times35}\)
= \(\dfrac{31\times2\times7\times21\times3}{21\times31\times2\times5\times7}\)
= \(\dfrac{3}{5}\)