数学门诊部。（把错误的改正过来。）（1）[340-（160-80）]÷20=[180-80]÷20=100÷20：=5（2）（175-35÷7）×4=（140÷7）×4=20×4=80。
直接写出得数．×40== 25×==== 1﹣50%=÷==×=
直接写得数．×=÷2=×14= 10×=×2=×=÷=÷=
直接写出得数×10=+= 52×= 9÷=÷= 11﹣= 0÷×=﹣+= 1÷9×=
直接写出得数．=========================
直接填得数×=×= 16×=÷= 1÷=÷= 9÷=÷33= 1﹣25%= 75%+0.25=÷=﹣=
×40=
= 25×
=
=
=
= 1﹣50%=
÷
=
=
×
=
×
=
÷2=
×14= 10×
=
×2=
×
=
÷
=
÷
=
×10=
+
= 52×
=
=
÷
= 11﹣
=
×
=
﹣
+
= 1÷9×
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
×
×
= 16×
=
÷
= 1÷
=
÷
= 9÷
=
÷33= 1﹣25%= 75%+0.25=
÷
=
﹣
=
粤公网安备 44130202000953号