直接写得数：
+
= 7÷2.5÷4= 4.8÷0.12= （
﹣
）×12=
（25%﹣
）×7.5= 2.2+3.57= 2÷
= 0.25×40=
÷﹣÷
= 
+
÷=
直接写得数．
+
= 1﹣
=
+
=
﹣
=
1﹣28%=
×16=
×
= 36÷
=
÷
= 25×40%=
直接写出得数．
40×0.25= 1.25×0.8= 0.1÷0.01=0.6+1.9=
3.5﹣2.25= 12.8÷4=
+
=
﹣
=
12×
= 1÷
=
×
=
÷
=
直接写出得数
1﹣0.375= 0.125×8= 280﹣45= 1.3÷0.25=
400÷600= 8.64×100=
+
=﹣
=
×
=
÷
= 12×
= 6÷=
直接写出得数
0.5×400= 568﹣198=
÷
=
1÷
﹣÷1=
×12= 1.7+3.03=
13.5﹣5= 10﹣
﹣
=
24×0.5=
+
= 6﹣6÷6= 20×20%=
0.33= 7.2÷0.08= 4÷
= 12.5×6.4=
﹣
= 121×
=