计算下面各题,能简算的要简便计算 3500÷50-28×2 125×32 427+(78+273) 600-(76+15×2

计算下面各题,能简算的要简便计算 3500÷50-28×2 125×32 427+(78+273) 600-(76+15×20) 4100-163-337+400 450÷〔2×(16+9)〕

(1)3500÷50-28×2,
=70-56,
=14;

(2)125×32,
=125×8×4,
=1000×4,
=4000;

(3)427+(78+273),
=427+273+78,
=700+78,
=778;

(4)600-(76+15×20),
=600-(76+300),
=600-300-76,
=300-76,
=224;

(5)4100-163-337+400,
=(4100+400)-(163+337),
=4500-500,
=4000;

(6)450÷[2×(16+9)],
=450÷[2×25],
=450÷50,
=9.
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