20×5/6×3/4 2/5×5/6×3/8 2/7×14×5/8 9/10×2/3×5/6怎么计算
问题描述:
20×5/6×3/4 2/5×5/6×3/8 2/7×14×5/8 9/10×2/3×5/6怎么计算
答
20×5/6×3/4
=(20×5×3)/(6×4)
=25/2
2/5×5/6×3/8
=(2×5×3)/(5×6×8)
=1/8
2/7×14×5/8
=(2×14×5)/(7×8)
=5/2
9/10×2/3×5/6
=(9×2×5)/(10×3×6)
=1/2第2题和第4题错了,两个×号,你那有3个2/5×5/6×3/8
=(2×5×3)/(5×6×8)
=1/8
9/10×2/3×5/6
=(9×2×5)/(10×3×6)
=3/6
=1/2