直接写得数．
180×40= 1﹣0.625= 0.5÷0.02= 0.12=
+
=
×12= 1÷5%= 4π≈
口算
134﹣18= 1.01﹣0.98=
×
= 1.5×4=
7.45+8.55=
+
×8= 2÷0.25+1.1=
×6÷×6=
5.76﹣（2.76+0.8）= 108×
﹣10= 0.125×17×8= 0.43=
脱式计算（能简算的要简算）．
×59 1
﹣（+
） 0.125×0.25×8×4
87.7×11﹣87.7 4÷1.25÷0.8 8.05﹣0.75﹣
．
直接写出得数．
×
=
+
=
3÷
﹣
÷3=
﹣÷5=
（﹣
）×30= 9.1÷0.07=
×
×2= 1.01×23=
275﹣（167+275）=
×4÷4×=
用用简便方法计算，
①361﹣99 ②
+3.8+3.8+3.8+3.8 ③5×
④（
﹣
）÷
+22÷51．