a
3
?
b
36
180
●
○
1
2
4
5
10﹣0.78=
7.5×20%=
×1.6=
2.5×4+2.5×4=
0.52=
0.8÷0.01=
1﹣1÷9=
24×25%=
×8<40
25>4×