15/17+2/9减3/7等于多少?
2个回答
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解:15/17+2/9减3/7等于( 724/1071 )
∵已知需求出15/17+2/9减3/7等于多少
∴15/17+2/9减3/7
= 15/17 + 2/9 - 3/7
= (15×63)/(17×63)+(2×119)/(9×119)-(3×153)/(7×153)
= 945/1071 + 238/1071 - 459/1071
= 1183/1071 - 459/1071
= 724/1071
答:15/17+2/9减3/7等于724/1071
∵已知需求出15/17+2/9减3/7等于多少
∴15/17+2/9减3/7
= 15/17 + 2/9 - 3/7
= (15×63)/(17×63)+(2×119)/(9×119)-(3×153)/(7×153)
= 945/1071 + 238/1071 - 459/1071
= 1183/1071 - 459/1071
= 724/1071
答:15/17+2/9减3/7等于724/1071
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