Question

3.97÷98/97如何简便计算？

Answer 1

解：3.97÷98/97等于（ 38509/9800 ），【即约等于3.93】
∵已知需求出3.97÷98/97等于多少
X ÷ Y = X / Y = Z
∴3.97 ÷ 98/97
= （3×100+97）/100× 97/98
= 397/100 × 97/98
= 38509/9800
= 3.929489796
≈ 3.93
答：3.97÷98/97等于38509/9800，【即约等于3.93】

Answer 2

=3.97×97÷98
=3.97×(98-1)÷98
=3.97-3.97/98
=(3.97×98-3.97)÷98
=(3.97×100-3.97×3)÷98
=(397-11.91)÷98
=385.09÷98
=3又9109/9800