计算：4.8﹣3.09 3.6× 198+397 1.25×0.86.7+3 1÷1 3.5× ÷×．
直接计算= = = = = =
除以真分数，商一定小于被除数． ．
直接写出得数．①= ②= ③= ④=⑤= ⑥= ⑦= ⑧=⑨= ⑩1÷6÷3=
直接写出结果：10÷= ÷= ×= ﹢=×= ×= ﹣= ÷4=
女生人数比男生人数多，则男生比女生少． ．
198+397 1.25×0.8
3.5×
÷
×
= 
= 
= 
= 
= 
=
= ②
= ③
= ④
=
= ⑥
= ⑦
= ⑧
=
= ⑩1÷6÷3=
= 
÷
= 
×
= 
﹢
=
×
= 
×
= 
﹣
= 
÷4=
，则男生比女生少
． ．
粤公网安备 44130202000953号