1) 1277+(342+23)= 1277+23+342= 1300+342=1642 2) 2387-(387+1455)= 2000+1455=3455 3) (467+295)+33= 467+33+295=500+295=795
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1) 1277+(342+23)= 1277+23+342= 1300+342=1642 2) 2387-(387+1455)= 2000+1455=3455 3) (467+295)+33= 467+33+295=500+295=795