①169÷13+124×5,
=13+620,
=633;
②243+26+274,
=243+(26+274),
=243+300,
=543;
③35.24-(15.24+8.16),
=35.24-15.24-8.16,
=20-8.16,
=11.84;
④354-99,
=354-100+1,
=254+1,
=255;
⑤85.07-(15.3-4.8)+5.6,
=85.07-10.5+5.6,
=74.57+5.6,
=80.17;
⑥83×5+83×2+83×3,
=83×(5+2+3),
=83×10,
=830.
64×(17+169÷13)