1/2﹡4+1/袜瞎3﹡告庆空差脊3
=1/2×2/3×3/4×4/5+1/3×2/4×3/5
=1/5+1/10
=3/10
这逗昌都不会……
解:
原式=1/2×2/3×3/4×4/5+1/3×2/4×3/5
=1/4+1/10
=7/20
(估计只用回答最长那一行祥返就成谨指饥)
根改蠢者据题意得档胡:
1/2﹡4=1/2×2/3×3/4×4/5
1/3﹡3=1/3×2/4×3/5
因此,核薯1/2﹡4+1/3﹡3=1/2×2/3×3/4×4/5+1/3×2/4×3/5
=3/10
那坦察么简单···等于让敏茄1/2×2/3×3/4x4/5+1/3x2/4x3/5=1/4+1/拿知10=7/20
1/2×2/3×3/4×4\5+1\3×2\4×3\5=
3/10