小民看一本书,他第一天看了一半还多5页,还有15页没看,这本书有多少页? 小民看一本书共100页,第一天看到第15页,第二天看到第32...
\u5c0f\u6c11\u770b\u4e00\u672c\uff0c\u7b2c\u4e00\u5929\u770b\u4e86\u5168\u4e66\u7684\u4e00\u534a\u591a10\u9875\uff0c\u7b2c\u4e8c\u5929\u6b63\u597d\u770b\u4e86\u5269\u4e0b\u9875\u6570\u7684\u4e00\u534a\uff0c\u8fd9\u65f6\u8fd8\u526945\u9875\uff0c\u8fd9\u672c\u4e66\u6709\uff08\uff09\u9875\u65b9\u7a0b\u89e3\u6cd5 \u89e3\uff1a\u8bbe\u8fd9\u672c\u4e66\u6709X\u9875
\u4f9d\u9898\u610f\u5f97\uff1aX-1/2X-10-1/2(X-1/2X-10)=45
\u89e3\u5f97\uff1aX=200
\u7b54\uff1a\u8fd9\u672c\u4e66\u6709200\u9875\u3002
\u7b97\u672f\u89e3\u6cd5 \u301045/\uff081/2\uff09+10\u3011/\uff081/2\uff09=200\uff08\u9875\uff09
\u7b54\uff1a\u8fd9\u672c\u4e66\u6709200\u9875\u3002
100-15-32
=85-32
=53\u9875
绛旓細2脳(5+15)=40椤
绛旓細锛7 + 2 锛/[锛1 - 1/2锛-锛1 - 1/2锛* 1/2] = 36椤
绛旓細渚濋鎰忓緱锛歑-1/2X-10-1/2(X-1/2X-10)=45 瑙e緱锛歑=200 绛旓細杩鏈功鏈200椤点傜畻鏈В娉 銆45/锛1/2锛+10銆/锛1/2锛=200锛堥〉锛夌瓟锛氳繖鏈功鏈200椤点
绛旓細绗簩澶╃湅浜嗗墿涓嬬殑涓鍗锛屼篃灏辨槸浜屽垎涔嬩竴鐨勪竴鍗婁负鍥涘垎涔嬩竴 绗笁澶╃湅浜嗗墿涓嬬殑涓鍗婁篃灏辨槸鍥涘垎涔嬩竴鐨勪竴鍗婏紝鍏垎涔嬩竴 鎵浠ヤ笁澶╀竴鍏辩湅浜嗗叓鍒嗕箣涓
绛旓細涓ゅぉ鐪嬩簡鍏ㄤ功鐨 1梅锛1锛4锛夛紳1/5 36椤垫槸鍏ㄤ功鐨 1/5锛1/8锛3/40 杩鏈功鍏辨湁 36梅3/40锛480锛堥〉锛
绛旓細4/9锛岃涓鏈功涓1锛岀涓澶╃湅浜1/3杩樺墿2/3锛岀2澶╃湅浜嗗墿涓嬬殑1/3涔熷氨鏄1/3涔樹互鍓╀笅鐨2/3绛変簬2/9锛屽湪鐢1鍑忥紙2/9鍔1/3锛=4/9锛1/3=3/9锛
绛旓細鍋囪杩鏈功鏈塜椤 閭d箞绗竴澶╃湅鐨勯〉鏁版槸X/8+16 绗簩澶╃湅鐨勯〉鏁版槸X/6-2 涓ゅぉ鐪嬬殑椤垫暟鍔犱笂鍓╀笅鐨勯〉鏁板氨鏄功鐨勬婚〉鏁 鎵浠(X/8+16)+(X/6-2锛+88=X 瑙e緱X=144 鍗虫诲叡鏈144椤
绛旓細鍥炵瓟锛氫竴鍏辨湁100椤点 28鍔52鐨勫拰闄や互1鍑忎簲鍒嗕箣涓鐨勫樊
绛旓細绗竴澶璇讳簡13 绗簩澶╄浜15 璁剧涓夊ぉ璇讳簡X+4 鍒欒繖涓夊ぉ骞冲潎璇讳簡X 灏辨湁鏂圭▼13+15+X+4=3X 瑙e緱X=16 鍒欑涓夊ぉ璇讳簡X+4=2O椤
绛旓細鍥炵瓟锛氳绋嶇瓑,姝e湪瑙g瓟~