15÷0.25= 1.5×
= 2.4+1
= 1÷1.25×8=
24×
=
= 10
= 8
+
=
×1.8=
=
= 0.78+1
+0.32=
直接写出得数．
1﹣45%= 0.4÷2.5= 15÷
=
×
=
÷
=
×
=
口算．
8.1÷0.03=
+3=
×
=
﹣
=
×
= 134﹣18= 1.5×4= 7.45+8.55=
25÷
= 2.4﹣
= 3.5×
=
×
=
直接写得数．
3.14×22= 4÷6= 100×0.1%= 0.36+0.4=
3.75﹣1.25+0.25= 1.6×1.25= 734﹣198= 637÷8≈
直接写出得数．
304+198= 3﹣
= 10
×2= 1﹣4÷7=
7.5×
= 5.2×6= 3.85×0+2.4= 21
÷7=