①(9.4-5.8)×2.07,
=3.6×2.07,
=7.452;
②12.54-4.56-3.44-1.54,
=(12.54-1.54)-(4.56+3.44),
=11-8,
=3;
③(9.36×5+9.36+9.36×2)×1.25,
=9.36×(5+2+1)×1.25,
=9.36×8×1.25,
=9.36×(8×1.25),
=93.6;
④7.236÷0.18-14.3×0.02,
=40.2-0.286,
=39.914.
①(9.4-5.8)×2.07,
=3.6×2.07,
=7.452;
②12.54-4.56-3.44-1.54,
=(12.54-1.54)-(4.56+3.44),
=11-8,
=3;
③(9.36×5+9.36+9.36×2)×1.25,
=9.36×(5+2+1)×1.25,
=9.36×8×1.25,
=9.36×(8×1.25),
=93.6;
④7.236÷0.18-14.3×0.02,
=40.2-0.286,
=39.914.