47.3﹣17 +1 ﹣2.25 | 243×8 +75.7×82.5 | 15.3﹣4.5÷0.18×56% |
| 765÷17×36﹣620 | 1 ÷[ ﹣（ ﹣ ）] | 2015× |
=2÷ ﹣ = | 48÷1.2= | 2.4÷0.06= | 8.3+6= |
| 9.5÷1%= |  ÷18= | 7.2﹣0.48= | 99× = |
| 2﹣= | 118÷198×0= |  ﹣ = | ×4÷×4= |
| 20.86﹣5.63﹣4.37 | 624÷6﹣38 | 12.5×32×25% |
 ÷[（ + ）× ] | （ + ）×24 | 69÷（2.4× +1.5） |
 ﹣ = |  + = |  ×12= |
 ÷ = |  ÷20%= | 4.8+2%= |
+
=
﹣
=
×
=
=0.4= %=2： ． 
=6： = % | 3.3+2.58= | 64÷ = | 0÷ = | 2﹣0.55= | 1+36%= |
 ×80%= | 5.2÷0.02= | 0.85﹣70%= |  + = | 1﹣﹣ = |
 ×7.5%÷×7.5%= | 99×65+65= | 31.4×15×= | ÷= |
| 571﹣402= |  ﹣ = | 3.04﹣1.4= | 18÷6%= | × ÷ ×= |
 ÷25%= |  + ÷2= |  ÷= | 1﹣0.01= | 0.18÷0.15×0= |
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