3-3/86为什么等于2带83/86
3-3/86为什么等于2带83/86
日期：2021-07-22 21:49:53 人气：1
87×3/86+83/86
=(86+1)×3/86+83/86
=86×3/86+1×3/86+83/86
=3+(3/86+83/86)
=3+1
=4
0.13×2.8÷(0.39×1.4)
=(0.13÷0.39)×(2.8÷1.4)
=1/3×2
=2/3
=(86+1)×3/86+83/86
=86×3/86+1×3/86+83/86
=3+(3/86+83/86)
=3+1
=4
0.13×2.8÷(0.39×1.4)
=(0.13÷0.39)×(2.8÷1.4)
=1/3×2
=2/3