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-524[23+(-45)]+524(-45+123)\(=524.[-23+\left(-45\right)+\left(-45\right)+123]\)
\(=524.[\left(-23+123\right)+\left(-45+-45\right)]\)
\(=524.[100+\left(-90\right)]\)
\(=524.10=5240\)
HTDT
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a)=234(1257-257)
=234.1000
=234000
b)=524(1327-327)
=524.1000
=524000
c)=325(1574-325-24)
=325.1225
=398125
d)=175(1274-273-1)
=175.1000
=175000
234x (1257-257)= 234 x 1000 = 234000
1327 x 524 - 524 x 327 = 524 x (1327 - 327 ) = 524 x 1000 = 524000
325x1574 - 325 x 325 -325 x24 =325 x(1574 - 325 - 24 )= 325 x 1225 =398125
175 x 1274 - 175 x273 -175 = 175 x (1274 - 273 -1) = 175 x 1000= 175000
kkk mk nha bạn !!!!!!!!
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a)524.[23+(-45)] + 524.(-45+123)
=524.(-22) + 524.78
=524.(-22+78)
=524.100
=52400
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-4824
-439