7.95-0.33-0.67
3.2×1.25×2.5 8.3×2.9+0.71×83 0.99 +4.52+5.48
[180+19×(106+74)]÷60 40.65-(20.38-16.85)
87×47+53×87 73.72-(36.28+3.72)
①772-317+128-283
②2.4÷( -20%)
③1-
④5.125× +2.875÷4
⑤