3.99+0.1= 1÷1%= ÷3= 6- = 0.25× ×4=
5-3.09= = 4.3+3.57= 1.9-2÷4= 4× ÷4× =
3÷= ×= ×= ÷22= ×÷×=
+= ()3= ÷= ×5×6= 0×÷=
9.6÷2.4=
3.14×4=
10-0.09=
60÷1.2=
201×5=
1000×3.7%=
202=
1-12.5%=
=
4.3÷10%=
3511﹣399=
4.97+5.3=
2.5×1.6=
1.9×5.1≈
31.9÷8.1≈
0.32﹣0.23=
平方米=平方分米