8×6=
7×7=
8×4-8=
9×4=
9×7-9=
9×2=
5×9=
7×1=
6×9=
7+7+7+7+7=
6×7=
23+6=
9×8=
46-9=
5×8+5=
3×8=
3×7=
17+8=
7×8=
8×8=
9×<51 9×<70
9×<37 9×<27
9×<42 9×<65
11+36+950 8268+4+10
7968+9-16 58+860-20+11
8185-29+25 72+8-272+9-1
400÷80= 7.7+2.3= 4.2÷0.6= 1﹣0.91=
0.04×1000= 10÷1.25×9= 24×0.25= 23﹣1=
+= ×20=
1时15分=时