-37.(1-382)-(382.37)
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a: 200<314
=>1/200>1/314
=>17/200>17/314
b: 11/54=22/108
37<108
=>22/37>22/108
=>22/37>11/54
c: 141/893=3/19
159/901=3/17
mà 3/19<3/17
nên 141/893<159/901
d: 9/382=18/764=90/3820
6/257=18/771=90/3855
15/643=90/3858
3820<3855<3858
=>90/3820>90/3855>90/3858
=>9/382>6/257>15/643
a: 200<314
=>1/200>1/314
=>17/200>17/314
b: 11/54=22/108
37<108
=>22/37>22/108
=>22/37>11/54
c: 141/893=3/19
159/901=3/17
mà 3/19<3/17
nên 141/893<159/901
d: 9/382=18/764=90/3820
6/257=18/771=90/3855
15/643=90/3858
3820<3855<3858
=>90/3820>90/3855>90/3858
=>9/382>6/257>15/643
a,714+382+286+318
\(=\left(714+286\right)+\left(382+318\right)\)
\(=1000+700\)
= \(1700\)
b,18.73+15.18+12.18
\(=18.\left(73+15+12\right)\)
\(=18.100\)
\(=1800\)
c,(37+63) : {250:[450-(4.5^3-2^2.25)]}
\(=100:\left\{250:\left[450-\left(2^2.125-2^2.25\right)\right]\right\}\)
\(=100:\left\{250:\left[450-\left(2^2.\left(125-25\right)\right)\right]\right\}\)
\(=100:\left\{250:\left[450-400\right]\right\}\)
\(=100:\left\{250:50\right\}\)
\(=100:5\\ =20\)
CHÚC BANJ HỌC TỐT!!
a) 714+382+286+318
=(714+286)+(382+318)
=1000+700
=1700
b) 18.73+15.18+12.18
=18.(73+15+12)
=18.100
=1800
c) (37+63):{250:[450-(4.5^3-2^2.25)]}
=100:{250:[450-(4.125-4.25)]}
=100:{250:[450-4.(125-25)]}
=100:{250:[450-4.100]}
=100:{250:[450-400]}
=100:{250:50}
=100:5
=20
-Chúc bạn học tốt-
\(-37\left(1-382\right)-\left(382.37\right)\\ =\left(-37\right)\left(-381\right)-382.37\\ =37.381-37.382\\ =37.\left(381-382\right)\\ =37.\left(-1\right)\\ =-37\)
\(=-37\cdot1+37\cdot382-382\cdot37=-37\)