①7.49+4.51-6.479
②6.35+8.24+1.65+2.74
③374×83-83+83×27
④11000÷125
⑤31×(21-65÷5)×25
⑥6000÷(125×6)
43.07+52.9=
101×40=
52÷13=
45×2÷9=
111×40≈
308×20≈
9-6.47=
7.8+13.12=
( )+297=551
( )-193=241
( )÷9=46
( )×29=377
①(742-597)÷5
②936÷9×3
③(248+376)÷6
④88×125
⑤486+243+514+757
⑥99×101-99
[180+19×(106+74)]÷60 40.65-(20.38-16.85)
87×47+53×87 73.72-(36.28+3.72)