①(4300-600)÷(20+5×70)
=3700÷(20+350)
=3700÷370
=10;
②190+(16-7)×15
=190+9×15
=190+135
=325;
③1000+(32+64)×10
=1000+96×10
=1000+960
=1960
④180-180÷12×5+30
=180-15×5+30
=180-75+30
=105+30
=135; ⑤54×16+(1141-168÷28)
=864+(1141-6)
=864+1135
=1999;
⑥(327+18×12)×400
=(327+216)×400
=543×400
=217200.