6×6= 29-6= 26+30= 3×4+20=
73-25= 5×3= 58+20= 7+20+30=
2×6= 46-7= 3×4= 2×5+45=
69+12= 88-69= 70-45= 35+(67-18)=
9+78= 38+44= 57-19= 6+52-26=
(个)
52+20= 62-4= 56 -30= 27+5=
76-30= 9+25 = 46-8= 90+4=
31+5= 6+30= 60-1= 64-50=
2÷2=
24÷6=
30÷5=
30-6=
3×4=
3×6+30=
42+30=
36-7=
14-8=
6+28=
78-70=
45-9=
50+2=
48-0=
11+9=
20+80=
43-5=
86-6=
78-4=
5+55=
32+50=
63-1=
方程: