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涓夌殑鍊嶆暟杈╁畯鍏勬槸6. 9. 45. 60
鍚?鍥犳暟浜旂殑鏄?15. 45. 60
鏄?浜岀粷瑾?,鍙堟槸涓夋惡琚?鐨勫?嶆暟鏄?6. 60
鍚屾椂鏄?涓夊拰浜旂殑鍊嶆暟鏄?15. 45. 60
榪欐槸鍑犻亾灝忓?︽瘯涓氭柊棰樺瀷棰樺簱鐨勯?橈紝綆?綆楀?備笅錛?
0.61脳0.25+0.18脳1/4+0.21脳25/100
= 0.61脳1/4+0.18脳1/4+0.21脳1/4
= 1/4 脳錛?0.61+0.18+0.21錛?
=1/4 脳1
=1/4
9999脳7+1111脳37
=1111脳9脳7+1111脳37
=1111脳63+1111脳37
=1111脳錛?63+37錛?
=1111脳100
=111100
999脳778+333脳666
=999脳778+333脳3脳222
=999 脳778+999脳222
=999脳錛?778+222錛?
=999脳1000
=999000
20022002/20012001
=2002脳10001/2001脳10001
=2002/2001
231梅231鍙?231/232
==231梅(231+231/232)
=231梅[231脳(1+1/232)]
=1梅(1+1/232)
=1梅(233/232)
=232/233
浠庝笂闈?涓?浜涢?樼湅鍑猴紝鏃犺?烘柊棰樺瀷榪樻槸鏅?閫氶?樺瀷錛岀畝綆楃殑鎶?宸у拰鏂規硶閮芥槸鐩稿悓鐨勶紝榪欎釜闇?瑕佸嫟緇冨?氳?傚療銆傚皬瀛﹂樁孌電殑綆?綆楁柟娉曞嵆榪愮敤鎵?瀛︾殑榪愮畻瀹氬緥錛屽彲浠ヤ嬌璁＄畻榪囩▼綆?鍗曪紝鍚屾椂鍥㈣疆鐑傚張涓嶅?規槗鍑洪敊錛屽叿浣撴?葷粨濡備笅錛?
1.褰撲竴涓?綆?綆楅?樺彧鏈夊悓涓?綰ц繍綆楋紙鍙?鏈変箻闄ゆ垨鍙?鏈夊姞鍑忚繍綆楋級鍙堟病鏈夋嫭鍙鋒椂錛屽彲浠モ?滃甫絎﹀彿鎼?瀹垛?濄?傚??
(a+b+c=a+c+b, a+b-c=a-c+b,a-b+c=a+c-b,a-b-c=a-c-b;a脳b脳c=a脳c脳b, a梅b梅c=a梅c梅b ,a脳b梅c=a梅c脳b, a梅b脳c=a脳c梅b)
2.娣誨姞鎷?鍙蜂嬌榪愮畻璁＄畻綆?渚匡細
褰撶畝綆楅?樹腑鍙?鏈夊姞鍑忚繍濉屾紡綆楀張娌℃湁鎷?鍙鋒椂錛屽彲浠ュ湪鍔犲彿鍚庨潰鐩存帴娣繪嫭鍙鳳紝鎷?鍒版嫭鍙烽噷鐨勮繍綆楀師鏉ユ槸鍔犺繕鏄?鍔狅紝鏄?鍑忚繕鏄?鍑忋?備絾鏄?鍦ㄥ噺鍙峰悗闈㈡坊鎷?鍙鋒椂錛屾嫭鍒版嫭鍙烽噷鐨勮繍綆楋紝鍘熸潵鏄?鍔狅紝鐜板湪灝辮?佸彉涓哄噺錛涘師鏉ユ槸鍑忥紝鐜板湪灝辮?佸彉涓哄姞錛涘?傦細
a+b+c=a+ (b + c ),a+b-c=a +(b-c), a-b+c=a 鈥?(b-c),a-b-c= a-( b +c);
鍚岀悊褰撶畝綆楅?樹腑鍙?鏈変箻闄よ繍綆楀張娌℃湁鎷?鍙鋒椂錛屽彲浠ュ湪涔樺彿鍚庨潰鐩存帴娣繪嫭鍙鳳紝鎷?鍒版嫭鍙烽噷鐨勮繍綆楋紝鍘熸潵鏄?涔樿繕鏄?涔橈紝鏄?闄よ繕鏄?闄ゃ?備絾鏄?鍦ㄩ櫎鍙峰悗闈㈡坊鎷?鍙鋒椂錛屾嫭鍒版嫭鍙烽噷鐨勮繍綆楋紝鍘熸潵鏄?涔橈紝鐜板湪灝辮?佸彉涓洪櫎錛涘師鏉ユ槸闄わ紝鐜板湪灝辮?佸彉涓轟箻銆傚?傦細
a脳b脳c=a脳(b脳c), a脳b梅c=a脳(b梅c), a梅b梅c=a梅(b脳c) ,a梅b脳c=a梅(b梅c)
3.鍘繪帀鎷?鍙蜂嬌榪愮畻璁＄畻綆?渚匡細
褰撶畝綆楅?樺彧鏈夊姞鍑忚繍綆楀張鏈夋嫭鍙鋒椂錛屽彲浠ュ皢鍔犲彿鍚庨潰鐨勬嫭鍙風洿鎺ュ幓鎺夛紝鍘熸潵鏄?鍔犵幇鍦ㄨ繕鏄?鍔狅紝鏄?鍑忚繕鏄?鍑忋?備絾鏄?鍦ㄥ皢鍑忓彿鍚庨潰鐨勬嫭鍙峰幓鎺夋椂錛屽師鏉ユ嫭鍙烽噷鐨勫姞錛岀幇鍦ㄨ?佸彉涓哄噺錛涘師鏉ユ槸鍑忥紝鐜板湪灝辮?佸彉涓哄姞銆傚?傦細
a+ (b + c )= a+b+c 錛?a +(b-c)= a+b-c錛?a 鈥?(b-c)= a-b+c錛?a-( b +c)= a-b-c;
鍚岀悊褰撶畝綆楅?樺彧鏈変箻闄よ繍綆楀張鏈夋嫭鍙鋒椂錛屽彲浠ュ皢涔樺彿鍚庨潰鐨勬嫭鍙風洿鎺ュ幓鎺夛紝鍘熸潵鏄?涔樿繕鏄?涔橈紝鏄?闄よ繕鏄?闄ゃ?備絾鏄?鍦ㄥ皢闄ゅ彿鍚庨潰鐨勬嫭鍙峰幓鎺夋椂錛屽師鏉ユ嫭鍙烽噷鐨勪箻錛岀幇鍦ㄥ氨瑕佸彉涓洪櫎錛涘師鏉ユ槸闄わ紝鐜板湪灝辮?佸彉涓轟箻銆傚?傦細
a脳(b脳c) = a脳b脳c錛?a脳(b梅c) = a脳b梅c錛?a梅(b脳c) = a梅b梅c 錛? a梅(b梅c) = a梅b脳c錛?
4.涔樻硶鍒嗛厤寰嬬殑涓ょ?嶅吀鍨嬬被鍨?
涓?涓?鏄?鎷?鍙烽噷鏄?鍔犳垨鍑忚繍綆楋紝涓庡彟涓?涓?妗愭縺鏁扮浉涔橈紝娉ㄦ剰鍒嗛厤錛?
鍙︿竴涓?鏄?娉ㄦ剰鐩稿悓鍥犳暟鐨勬彁鍙栵紱濡備笂渚嬮?橈紙 0.61脳0.25+0.18脳1/4+0.21脳25/100 錛?
5.榪樻湁涓?浜涚畝綆楀皬鎶?宸?
錛?1錛夊閥鍊燂細錛堝??9999+999+99+9=10000-1+1000-1+100-1+10-1=11110-4=11106錛?
錛?2錛変笉鏀瑰彉鏁板垎鎷嗭紝濡備笂渚嬮?橈紙999脳778+333脳666錛?
錛?3錛夊閥鍙橀櫎涓轟箻
錛?4錛夋敞鎰忔瀯閫狅紝璁╃畻寮忔弧瓚充箻娉曞垎閰嶅緥鐨勬潯浠訛紱濡備笂渚嬮?橈紙9999脳7+1111脳37 錛?
涓?棰樹笉鐭?2錛氬墠鏁拌?鵑渶鍚?鑽?閲?35%鐨勮嵂鎱ф礊棣栨按xkg35%錛歺=1.75%錛?800x=160003錛氳?句箰涔愬?剁殑鐢電儹姘村櫒姘撮噺鍗囬ⅳ婕忔槸xLx-20%-18[x-(20%+18)]*10%=50%-3x-0.2-18-[0.1-(0.02x+18)]=0.5x-30.8x-18-0.08x+1.8 =0.5-3x=60
棰樼洰鍛?錛熴?傘?傘?傘?傘?傘?傘?傘??1銆?3.82銆?0.9
x鍑忎簲鍒嗕箣涓墄絳変簬涓夊張浜斿垎涔嬩竴
x-3/5x=16/5
5x-3x=16
2x=16
x=8
涓墄鍑忛浂鐐瑰叓涔樼櫨鍒嗕箣涓冨崄浜旂瓑浜庝簩鐐逛竴
3x-0.8*75%=2.1
3x-4/5*3/4=2.1
3x-3/5=2.1
3x=2.1+0.6
3x=2.7
x=0.9
x涔橈紙涓?鍑忕櫨鍒嗕箣涓夊崄浜旂偣涓冿級絳変簬鍏?鍒嗕箣浜?
x(1-35.7%)=5/8
x*0.643=0.625
x=0.972
鍥涚偣浜寈闄や互涓?鐐瑰叚鍑忎憨鏁ｈ繜鍗佸洓絳変簬闆剁偣涓?涓冧簲
4.2x/1.6-14=0.175
2.625x=14.175
x=5.4
闆剁偣涓冧簩涔樹笁鍑忛浂鐐逛笁x絳変簬闆剁偣闆跺叚
0.72*3-0.3x=0.06
0.72-0.1x=0.02
0.1x=0.7
x=7
浜旈櫎浠ワ紙x鍔犲崄鍏?鐐瑰叓鍥涳級絳変簬浜斿垎涔嬩竴
5/(x+16.84)=1/5
x+16.84=25
x=8.16
鍥涘垎涔嬩笁鍔犲叚鍒嗕箣浜攛鍑忓叚絳変簬涓夊垎涔嬩竴
3/4+5/6x-6=1/3
9+10x-72=4
10x=67
x=6.7
涓?鍙堜簲鍒嗕箣涓夐櫎浠ワ紙x鍑忛浂鐐瑰洓浜旓級絳変簬涓夊張浜斿垎涔嬩竴
8/5梅(x-0.45)=16/5
1梅(x-0.45)=2
x-0.45=1/2
x=0.95
鍥涘垎涔嬩笁x鍑忕櫨鍒嗕箣浜攛絳変簬鍗佷竷鐐逛簲
3/4x-5%x=17.5
75x-5x=1750
70x=1750
x=25
鍏?鍗佷竴x鍑忎笁鐧懼洓鍗佷簩絳変簬涓冨崄鍏?錛坸鍑忎簩錛?
x/8-342=76(x-2)
x-2736=608x-1216
607x=-1520
x=-2.504
涔濈偣涓?鍑忎笁x絳変簬榪呮潕鍥泋鍔犱竷
9.1-3x=4x+7
7x=2.1
x=0.3
鍥涳紙x鍑忎竴鐐逛簩錛夌瓑浜庝竴鐐逛簲x鍔犱簲鐐逛簩
4(x-1.2)=1.5x+5.2
4x-4.8-1.5x=5.2
2.5x=10
x=4
浜寈鍑忎簩鍒嗕箣x鍔犳帢浜忎竴絳変簬浜屽姞浜屽垎涔媥鍔犱竴
2x-x/2+1=2+x/2+1
2x-x=2
x=2
