五又三分之二乘以五分之三加七十一又四分之一乘以七分之四加九十一又五分之四乘以九分之五。求过程,谢谢
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五又三分之二乘以五分之三加七十一又四分之一乘以七分之四加九十一又五分之四乘以九分之五
=(5+2/3)(3/5)+(71+1/4)(4/7)+(91+4/5)(5/9)
=5(3/5)+(2/3)(3/5)+71(4/7)+(1/4)(4/7)+91(5/9)+(4/5)(5/9)
=3+2/5+284/7+1/7+455/9+4/9
=3+2/5+285/7+459/9
=3+2/5+40+5/7+51
=94+2/5+5/7
=94+(14+25)/35
=94+39/35
=95+4/35
=九十五又三十五分子4
=(5+2/3)(3/5)+(71+1/4)(4/7)+(91+4/5)(5/9)
=5(3/5)+(2/3)(3/5)+71(4/7)+(1/4)(4/7)+91(5/9)+(4/5)(5/9)
=3+2/5+284/7+1/7+455/9+4/9
=3+2/5+285/7+459/9
=3+2/5+40+5/7+51
=94+2/5+5/7
=94+(14+25)/35
=94+39/35
=95+4/35
=九十五又三十五分子4
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