列竖式计算．
口算×1.8= = = 7.8÷0.01=
直接写出得数．×= ×1.2= 32×1= ×÷×=1÷0.1﹣0.1×1= 2.8﹣（1+）= +21÷56= 1252﹣998=
16××=
﹣= 52= += 100÷0.01=××= 28﹣﹣= 13×4÷13×4= 2÷1+2×=6.54﹣2.8﹣1.2= （+﹣）×30=
计算：①2﹣1.75= ；②30×= 1 ；③（++）÷= ；④30×29﹣29×28+28×27﹣27×26+…+4×3﹣3×2= ．⑤1÷（1﹣）×（1+）÷（1﹣）×（1+）÷…÷（1﹣）×（1+）= ；⑥方程：65%（x﹣1）=37%（x+1）+0.1的解是x= ．
×1.8= 
= 
= 7.8÷0.01=
×
= 
×1.2= 32×1
= 
×
÷
×
=
+
）= 
+21÷56= 1252﹣998=
×
=
﹣
= 52= 
+
= 100÷0.01=
×
×
= 28﹣
﹣
= 13×4÷13×4= 2÷1
+2×
﹣
）×30=
﹣1.75= ；②30
×
= 1
+
+
）÷
= ；
）×（1+
）×（1+
）×（1+
粤公网安备 44130202000953号