共30题用时5分钟

25×18=

7×19+7=

1260÷30=

272-97=

490÷35=

14.5÷100=

42×8×4=

14.5÷100=

(150+50)×8=

8+0.4=

1.29-0.18=

180÷5÷4=

2.5+3.2=

198+27=

103×40=

2.4-1.7=

(22+78)×7=

160×3=

2.4-1.8=

86.2+15.8=

(25+24)×4=

213÷3=

0.25+0.75=

420-150=

9+0.1=

8-2.5=

175-35=

174-48-52=

46+49+51=

1.05-0.09=