74+6-80= 14厘米-8厘米= ( )×( )=1+5
20米+7米=( )米 ( )×( )=6+6+6
31-2=
92-50=
2×6=
2×2+4=
36+3=
66+9=
3×3=
5×2+5=
13+45=
42+8=
5×5=
4×3-2=
44+7=
68-45=
5×(4+2)=
36+22=
36+23=
35+29=
53+47=
55-36=
81+9=
2×4+3=
3×6=
4×5=
2×4=
27﹣7=
70+30=
62+30=
2×2=
6×5=
3×4=
26﹣16=
2×5+6=
4×5﹣6=
1×6+9=
6×4﹣7=