直接写出得数
2.2+3.57=（ 
）2﹣（
）2=
+
= 0.375×
=
÷1.5= 1
×7
=
：
=
12.5×8.24×8=
直接写出得数．
×12=
+
= 10×
=
﹣
= 1÷
=
12÷
=
÷
=
×=÷
=
÷
=
18+46= 2.5×0.8= 3.8﹣0.9= 36÷2= 3.5÷0.5=
口算．
=
=
=
=
0.125×8=
= 0.37+1.3=
=
= 2008×99+2008=
直接写出各题得数．
0.4÷40%= 0.64+3.6= 0.25×4=
0.56×
=
×= 5.6÷0.1%=
÷2=
×
=
÷3+3÷=
6.73×99+6.73=
直接写出结果．
1÷
=
÷10= 6×
= 1﹣75%=
÷
=
×
= 5÷1%= 4÷
=