用简便方法计算。
| ⑴15﹣0.3= |
⑵6﹣0.5= |
⑶3.9+12.1= |
⑷2.13+14= |
⑸0.91+1.25= |
| ⑹10﹣0.76= |
⑺3.99﹣0.9= |
⑻0.567+4.44= |
⑼0.37+0.6= |
⑽7.46+2.54= |
| ⑾1﹣0.08= |
⑿45.9+1= |
⒀6.87﹣3.25= |
⒁0.25+0.75= |
⒂0.78+0.22= |
| ⒃6.1﹣5.7= |
|
=x:
x=
＋
－