19﹣2.3×3.60.125×2.5×8×0.4（18.02+12.58）×1.342.3÷0.09×1.80.35÷0.25×49.06×10.1﹣0.1×9.06．
直接写出得数．21×= 1÷= ÷= 8×=÷= += 5﹣= ×=
直接写出得数．①×5= ②×= ③2﹣= ④2÷= ⑤÷1=⑥0×= ⑦×= ⑧÷= ⑨÷21= ⑩+=
口算：×3= ，×2= ，×= ，×= ，÷4= ，÷= ，÷= ，÷= ．
直接写出得数．15×= 6= 0.52=30：= 3.2+0.68= 6×÷6×=
直接写得数×15= ×2= ×= ×= ×=1×= ×= ×34= ×= ×=×= ×= ÷10= ÷= 0÷=÷4= 1÷= 22÷= ÷= ÷0.4=
= 1÷
= 
÷
= 8×
=
÷
= 
+
= 5﹣
= 
×
=
×5= ②
×
= ③2﹣
= ④2÷
÷1=
= ⑦
×
= ⑧
÷
= ⑨
÷21= ⑩
+
=
×3= ，
×2= ，
×
= ，
×
= ，
÷4= ，
÷
= ，
÷
÷
= ．
= 
6= 0.52=
= 3.2+0.68= 6×
÷6×
×15= 
×2= 
×
= 
×
= 
×
=
= 
×
= 
×34= 
×
= 
×
=
×
= 
×
= 
÷
= 0÷
=
÷4= 1÷
= 22÷
= 
÷
÷0.4=
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