2×9=
7×5=
2×3=
8×2=
2×2=
2×5=
1×2=
6×2=
4×2=
5×8=
17+20=
45-7=
1×1=
35-(6+20)=
4×9=
8×6=
50+50=
46+(7-5)=
59-30=
2×2=
7×3=
5+5×4=
9×6=
60-8=
66+20=
37-18+25=
43+57=
70-59=
83-25=
23+66-48=
60-45+26=
90-(31-17)=
或
王叔叔这周一共工作多长时间?