五分之四加多少等于七分之九，4/5加多少等于9/7减多少等于多少乘2/7？ 5/7 9分之4 2/7等于多少
7\u5206\u4e4b9\u51cf9\u5206\u4e4b4\u51cf9\u5206\u4e4b5\u7b49\u4e8e\u591a\u5c11?(\u7b80\u4fbf\u8ba1\u7b97)7\u5206\u4e4b2
\u628a\u540e\u9762\u76849\u5206\u4e4b4\u548c9\u5206\u4e4b5\u76f8\u52a0\u7b49\u4e8e1\uff0c\u53c87\u5206\u4e4b9\u4e3a1\u53c87\u5206\u4e4b2\uff0c\u76f8\u51cf\u5373\u4e3a7\u5206\u4e4b2.
1+2/7-\uff084/9+5/9\uff09=2/7
\u8bf7\u91c7\u7eb3\uff0c\u8c22\u8c22\u3002
5/7+9\u5206\u4e4b4+2/7
=5/7+2/7+4/9
=1+4/9
=1\u53c84/9
\u884c\u5bb6\u6b63\u89e3\uff0c\u4e0d\u660e\u767d\u53ef\u4ee5\u8ffd\u95ee\uff01\u795d\u60a8\u5b66\u4e60\u8fdb\u6b65
\u6ee1\u610f\u8bf7\u70b9\u51fb\u4e0b\u9762\u7684\u3010\u9009\u4e3a\u6ee1\u610f\u56de\u7b54\u3011\u6309\u94ae\uff0cO(\u2229_\u2229)O\u8c22\u8c22
?=9/7-4/5
=45/35-28/35
=17/35
4/5+1/5=9/7-2/7=7/2x2/7=2/9÷2/9=1
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绛旓細浣犲ソ锛屼緷棰樻剰鍙緱锛4/5鍗1/9 =(4x9)/(5x9)鍗5/(9x5)=36/45鍗5/45 =(36鍗5)/45 =41/45 甯屾湜鎴戠殑鍥炵瓟鑳藉府鍒颁綘锛岃阿璋紒
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绛旓細25鍔25鍒嗕箣浜屽崄鐨勫拰闄や互浜斿垎涔嬩竴绛変簬澶氬皯杩囩▼ 25鍔25鍒嗕箣浜屽崄鐨勫拰闄や互浜斿垎涔嬩竴 =[(25*25+20)/25]/(1/5) =(645/25)*5 =129 0.4鍔浜斿垎涔嬩竴绛変簬澶氬皯 0.6 涓鍑忎竷鐐逛簲鍒嗕箣涓绛変簬澶氬皯 涓鍑忎竷鐐逛簲鍒嗕箣涓绛変簬锛13/15锛夛紱 1-1/7.5 =1-2/15 =13/15 浜斿垎涔嬪洓绫...
绛旓細鏈嬪弸锛岃銆愰噰绾崇瓟妗堛戯紝鎮ㄧ殑閲囩撼鏄垜绛旈鐨勫姩鍔涳紝濡傛灉娌℃湁鏄庣櫧锛岃杩介棶銆傝阿璋
绛旓細鍏垎涔嬩簲銆佸洓鍒嗕箣涓夈佸崄鍒嗕箣涓冦浜斿垎涔涓夌浉姣3/4澶с傝繘琛岄氬垎璁＄畻锛5/8=锛5x5锛/锛5x8锛=25/40 3/4=锛3x10锛/锛4x10锛=30/40 7/10=锛7x4锛/锛10x4锛=28/40 3/5=锛3x8锛/锛5x8锛=24/40 鎵浠3/4澶с傚垎鏁扮殑鎬ц川锛氬鏋滀笉鏄竴涓渶绠鍒嗘暟灏辫鍏堝寲鎴愭渶绠鍒嗘暟鍐嶅垽鏂紱鍒嗘瘝鏄2鎴5...
绛旓細7鍒嗕箣13+5鍒嗕箣4+7鍒嗕箣1+5鍒嗕箣1 =7鍒嗕箣13+7鍒嗕箣1+锛5鍒嗕箣4+5鍒嗕箣1锛=7鍒嗕箣14+5鍒嗕箣5 =2+1 =3
绛旓細锛4/5+2/3锛墄7/11 =锛12/15+10/15锛墄7/11 =22/15x7/11 =14/15
绛旓細1/3+x=4/9;x=4/9-1/3;x=1/9;5/6-x=3/7;x=5/6-3/7;x=35/42-18/42;x=17/42;濡傛灉鏈鏈変粈涔堜笉鏄庣櫧鍙互杩介棶,
绛旓細绛変簬涔濆垎涔涓 4/5-4/5+7/9 =0+7/9 =7/9 璋㈣阿锛岃閲囩撼
