把上下同样多的用线连起来。
直接写得数2﹣= ×= 20%÷=×30%= 3.5+1.5= 0.5×=
直接写出得数+=1÷0.25= 3.14×8= 6.3×= 2.4÷=×= 80×40%= 21÷= ﹣×5= ×18×=
直接写得数+= ×12= 1÷5%= 1﹣0.625=
口算= = ×=2﹣= = ×=
直接写出得数．+=×3=××=÷=50÷1%=0.33=
= 
×
= 20%÷
=
×30%= 3.5+1.5= 0.5×
+
=
= 2.4÷
=
×
= 80×40%= 21÷
= 
﹣
×5= 
×18×
=
+
= 
×12= 1÷5%= 1﹣0.625=
= 
= 
×
=
= 
= 
×
=
+
=
×3=
×
×
=
÷
=
粤公网安备 44130202000953号