直接写结果．
×
=
÷
= 1111÷11= 4.6+4= 1÷12.5%=
= 102﹣33=
= 10.8﹣9.9﹣
= 0.9×9+0.9=
5.38﹣（1.8+2.38）= 121×29≈ 238÷41≈
= 2﹣2÷9=
=
×14= 36×
= 1÷
=
×÷×=
×6=
×
= 11﹣
= 23×52=
直接写得数．
×2.8 0.5÷0.01 2﹣1.4 2.5×12 2.3÷10%
125÷（0.25+） 10.8﹣3.9﹣4.1 （12+
）÷3．
非0自然数a与
的积一定小于a ．
直接写出得数
×7=
×
= 5﹣
=
×
=
+
×
=
20×4%= 0.36+1.42= 3.8﹣2.07= 657﹣598= 398×59≈
