Tinh nhanh :
a ) 146.53+146.48-146
b ) 13.27+18.(-27)+105.27
c ) -124-(-564-24)-364
d ) (1324+987-456)-(324-13)+556
e ) 2-4+6-8+-...-2008+2010
f ) 36.28+36.82+64.69+64.41
g ) 35.34+35.86+65.75+65.45

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