+= += ﹣=﹣= 1+= +=﹣= += +=﹣= += 1﹣=﹣= += +=62= 53= 0.125×8=6.25×13= 28÷56=
3:4= :8=9: == %
3÷ == :12=七成五= %
÷10==9: == :40.
18: = :20== ÷40=1.2.
1÷4= ÷12==6: = (小数)