÷3=
25%×4=
×0=
24×=
1÷-÷1=
1-38%=
=
0÷=
10.2+22%=
1÷=
×= 0×= ÷= +=
①÷15= ②1÷ = ③39×= ④3.14×0.12 =
⑤-= ⑥×= ⑦÷= ⑧×-×=
4×=
×= += ×= 14÷=
÷= 0×= ×1.2×1.4= 15-=
3.14×5= 3.14×7= 3.14×= 3.14×=
600平方米=公顷 升=升毫升