250X8=

3.9+2.03=

250-160=

560÷40=

0.6+5.47=

3200÷400=

360÷120=

1.29-0.18=

735-298=

6.4+1.07-0.47=

1.5－0.04=

0.49+0.61=

2.4X0.2=

0.64÷0.16=

55X80=

0.74÷0.001=

5.4-2.5-1.4=

75÷(18+14-27)=

900÷6-520÷40=

87÷(20+30-47)=

90+90÷(48÷8)=

(120-30X（2）÷4=

19X6+11X6=

90-69+27=

240X400=

900÷50=

3200÷200=

4200÷30=

650÷13=

15X400=

8X27X125=

1-0.2=

2÷1000=

25X18=

14.5÷100=

（150+50）X8=

490÷35=

14.5÷100=

42X8X4=

272-97=