口算，直接写出得数．
64﹣46= 1.72+2.38= 0.25×40= 2.4÷0.6= 
=
= 12
= 8×12.5%= 
= 0.52=
直接写出结果：
2.2+3.57= 1.125×8= 35×
= 4﹣
=
1﹣
﹣
= 1
×8+8×=
+
= 2÷=
3.25×4= 1.9+0.1﹣1.9+0.1=
直接写出得数．
9.8+6.7=
+0.2= 15﹣
= 1.25×8= 1÷0.25=
= 0×2
= 7.2÷4= 25÷10%= 1﹣
=
直接写出得数
7.5+2.5= 5.2÷1.3= 1.8×0.5= 4.5÷0.1=
+
=
﹣
=
×
=（
+
）×10=
1÷
+
= 1+2÷3= 1÷
×
=
÷
=
直接写出得数．
2.2+3.5= 0.4×30=
+
=
×
=
0×0.99= 67×99+67= 30×= 24÷=
直接写出得数．
0.36+1.7=
×
= 0.32×0.05= 1.2÷
=
6.8﹣1.08= 50×30%=
﹣
﹣
= 0.18÷0.12=