计算．= += == ﹣= == 1=
直接写出计算结果．×= 6×= 1.25×80%= 3.14×0.5×4=×15=+=÷= 0.56+0.34=×2÷×2=﹣=
根据算式涂一涂．×；×．
80个米相加是多少米？
直接写出得数．×=×=×=×= 5×=×21=×=×=×=×=
直接写出得数． 8π= 1.4﹣= 1﹣﹣﹣= 0.33+0.77= 10××= 18.84÷3.14=（+）×6=
= 
+
= 
=
= 
﹣
=
= 1
=
×
= 6×
= 1.25×80%= 3.14×0.5×4=
×15=
+
÷
= 0.56+0.34=
×2÷
×
；
×
．
米相加是多少米？
×
=
×
×
=
×
= 5×
=
×21=
×
=
×
=
×
=
×
=
= 1﹣
﹣
﹣
= 0.33+0.77=
×
= 18.84÷3.14=（
+
）×6=
粤公网安备 44130202000953号