直接写得数.
2/5﹣1/10= 16÷2/7= 1/2÷3/5= 1/7×1/7= 1/4×2/5=
5/6﹣1/2= 2/7×0+9= 3/5×1/21= 2/7×21= 14/17÷7=
1÷5﹣1/5= 4/7+4/7×6= (1/8+4/8)×4/5= 6×5÷1/2= 1/9÷1/3=
5/9×1/5÷5/9×1/5=
直接写得数.
2/5﹣1/10= 16÷2/7= 1/2÷3/5= 1/7×1/7= 1/4×2/5=
5/6﹣1/2= 2/7×0+9= 3/5×1/21= 2/7×21= 14/17÷7=
1÷5﹣1/5= 4/7+4/7×6= (1/8+4/8)×4/5= 6×5÷1/2= 1/9÷1/3=
5/9×1/5÷5/9×1/5=