共30题用时5分钟

0.52+0.4=

6.45+5.5=

4.5-1.3=

3.5+4.8=

8-4.6=

5.8-3.6=

0.25+0.75=

0.51+0.33=

1-0.6=

1-0.61=

0.47+0.23=

3.7+0.33=

3.5+2.4=

3.4-2.8=

5+0.07=

1.2-0.8=

0.83-0.5=

0.96-0.35=

9.53-1.53=

0.25+0.75=

3.4-2.8=

9.5-7.3=

1-0.95=

10+0.08=

7.82+0.3=

8.8-6.7=

8.8-6.7=

7.2+0.8=

9.5-7.3=

9.53-1.53=