共30题用时5分钟

3.7+2.3=

25×100=

3500÷70=

2+2.8=

3.2-0.32=

3.1+3=

380-290=

0.35+0.5=

3.8+0.38=

0.35+0.63=

3.8+1=

7500÷250=

0.95-0.05=

3.1+0.3=

450+780=

330×9=

9.53-1.53=

630÷9=

9.5-5=

4.5-0.4=

3+0.3=

1-0.95=

3.5+2.4=

9.5-0.5=

0.95+0.05=

2.5+3.2=

4.5+4=

0.47+0.13=

4-0.6=

0.3+0.27=