口算． 88﹣55= 199+65= 0.8×0.9= 3.2÷0.4= 6×60= 80÷= ﹣= +﹣=
x : =:
x - x=18.7
15.8-(6+÷12.5%)
10-÷×1
325×0.36+6.75×36
= 
﹣
= 
+
﹣
=
=
:
x=18.7
+
÷12.5%)
-
÷
×1
粤公网安备 44130202000953号