1÷(-)
0.9×=
×35=
×0=
=
3.5×=
8.9÷0.89=
10-0.98=
25×0.4=
3-=
302+402=
1.21×=
1+0.25×25%=
10÷10%=
×3=
÷1.5=
A.(1,1)
B.(3,1)
C.(3,2)