20+=25 51-=50 69=+60
11-3 12-8 15-8 11-2 13-7
<<<<
38+20-4= 56+30-4= 67-50+58=
34-20+73= 48-8+59= 30+9+40=
40+32+10= 90+8-50= 30+58-4=
(根)
(只)
341-29= 5.7+1.24= -0.25= × =
3.2÷80%= ÷ = ×0+ = 12.5×8÷12.5×8=