直接写得数． 425+75= 40×80= 4﹣0.6= 1×0.4×25= ×4= ÷= ++= 50÷25%×0= ﹣= 5.6÷7= ×﹣= ×6+×6=6
45÷×－1
×14
×9＋12×
42:=x:
x-x=
×4= 
÷
=
+
+
= 50÷25%×0= 
﹣
= 5.6÷7= 
×
﹣
= 
×6+
×6=6
×
－1
×14
×9＋12×
=x:
x=
粤公网安备 44130202000953号