帮我解一道数学计算题！能用简便尽量简便！
\u5e2e\u6211\u89e3\u9053\u6570\u5b66\u5e94\u7528\u9898 \u7b80\u5355\u7684\u3002\u7532\u3001\u4e59\u4e24\u961f\u5408\u4f5c\u5b8c\u6210\u5de5\u7a0b\u9700\u898120\u5929\uff1b----\u7532\u4e59\u5408\u4f5c\u5de5\u6548\u662f1/20
\u4e59\u961f\u5355\u72ec\u5b8c\u6210\u5de5\u7a0b\u7684\u65f6\u95f4\u662f\u7532\u961f\u76842\u500d\uff1b----\u7532\u961f\u7684\u529f\u6548\u662f\u4e59\u961f\u76842\u500d\u3002
\u7532\u961f\u529f\u6548=1/20*2/3=1/30-----\u7532\u961f\u72ec\u505a\u9700\u898130\u5929\u5b8c\u6210\uff1b
\u4e59\u961f\u529f\u6548=1/20-1/30=1/60----\u4e59\u961f\u72ec\u505a\u9700\u898160\u5929\u5b8c\u6210\u3002
\u7531\u7532\u961f\u72ec\u505a\u5b8c\u6210\u7684\u8d39\u7528=30*1000=30000\u5143
\u7531\u4e59\u961f\u72ec\u505a\u5b8c\u6210\u7684\u8d39\u7528=60*550=33000\u5143
\u7b54\uff1a\u5e94\u9009\u62e9\u7532\u961f\uff0c\u8d39\u7528\u4e3a3\u4e07\u5143\u3002
1. \u5c06\u540c\u5206\u6bcd\u7684\u5148\u8fdb\u884c\u8fd0\u7b97
\u539f\u5f0f=(4+4+2+3)+(9/13+11/13+6/13)+1/9=13+26/13+1/9=15/9=5/3
2. 450*\uff08\uff089-5\uff09/45\uff09=100*4=400
3. \u539f\u5f0f=808*1/8-1600/16=101-100=1
4. 2+5/6+(3+1/3+8/21*7/16-15)=2+5/6+(3+1/3+1/6-15)=6+1/3-15=-9+1/3
1989又6分之1=1989+1/6
1995.5=1995+1/2
1997又42分之1=1997+1/42
2007又7分之3-1989又6分之1+(-1995.5)-(-1997又42分之1)=2007-1989-1995+1997+3/7-1/6-1/2+1/42=20-9/42
(-8.4)*【2007又7分之3-1989又6分之1+(-1995.5)-(-1997又42分之1)】=-42/5*(20-9/42)=-168+9/5=
-166又五分之一
=﹙﹣8.4﹚×[﹙2007×42﹢18﹚／42－﹙1989×42﹢7﹚／42－﹙1995×42﹢21﹚／42﹢﹙1997×42﹢1﹚／42
＝﹙-0.2﹚×﹙2007×42﹢18﹣1998×42﹣7﹣1995×42﹣21﹢1997×42﹢1﹚
=﹣0.2×[42×﹙2007﹣1998﹣1995﹢1997﹚﹣9]
＝-0.2×﹙42×11－9﹚
=﹣0.2×353
=70.6
(-8.4)*【2007又7分之3-1989又6分之1+(-1995.5)-(-1997又42分之1)】
=-42/5*(20+18/42-7/42-21/42+1/42)
=-42/5*831/42=-831/5=-166.2
绛旓細15 鑰冪粷瀵瑰肩殑 19鍙15鍒嗕箣4澶т簬12鍙16鍒嗕箣7鐨 18鍙15鍒嗕箣11澶т簬10鍙16鍒嗕箣9鐨 鎵浠ュ寲绠寰楋紙19鍙15鍒嗕箣4-12鍙16鍒嗕箣7锛+锛18鍙15鍒嗕箣11-10鍙16鍒嗕箣9锛夊氨鏄紙19鍙15鍒嗕箣4+18鍙15鍒嗕箣11锛-锛12鍙16鍒嗕箣7+10鍙16鍒嗕箣9锛夊緱38-23=15 ...
绛旓細锛1.14脳10 锛11.4 浜屻佸眬閮ㄧ畝渚胯绠椼涓閬绠楀紡涓眬閮ㄥ彲浠ヨ繘琛岀畝渚胯绠楋紝杩欑褰㈠紡涔熶笉灏戣銆備笁銆佷腑閫旂畝渚胯绠椼傚紑濮嬭绠楀苟涓鑳界畝渚胯绠锛岃岀粡杩囦竴涓ゆ鍚庡嵈鑳借繘琛岀畝渚胯绠楋紝杩欑鎯呭喌鏈瀹规槗蹇借銆備緥濡傦細=1.2脳锛1+5+4锛=1.2脳10 =12 鍥涖侀噸澶嶇畝渚胯绠椼傚湪涓閬撻閲屼笉姝竴娆″湴杩涜绠渚胯绠楋紝杩欑...
绛旓細锛4.8+4鍒嗕箣1锛-3鍒嗕箣7 =5鍙20鍒嗕箣1-3鍒嗕箣7 =60鍒嗕箣283 2鍒嗕箣1脳锛5鍒嗕箣3-10鍒嗕箣1锛+10鍒嗕箣9 =2鍒嗕箣1脳2鍒嗕箣1+10鍒嗕箣9 =4鍒嗕箣1+10鍒嗕箣9 =20鍒嗕箣23
绛旓細37.5脳21.5脳0.112+35.5脳12.5脳0.112 =0.112脳锛37.5脳21.5+35.5脳12.5锛=0.112脳锛12.5脳3脳21.5+35.5脳12.5锛=0.112脳12.5脳锛3脳21.5+35.5锛=0.112脳12.5脳100 =1250脳锛0.1+0.01+0.002锛=125+12.5+2.5 =140 ...
绛旓細5脳锛3/5+2/7锛壝7 =5X5/3X7=2/7X7X5 666脳7+58脳111 =111X6X7+58X111 =111X(6X7+58)4/9脳13+7/9梅1/13-13 =4/9脳13+7/9X13-13X1 =(4/9+7/9-1锛塜13 1000梅0.4梅1.25梅8梅2.5 =1000/(0.4X1.25X8X2.5)=1000/[(0.4X2.5)X(1.25X8)]40/29脳18-11...
绛旓細1锛氶鍏堜綘瑕佺煡閬11脳11绫诲瀷闂鐨勮绠鍏紡锛屾瘮濡11脳11=121 111脳111=12321,1111脳1111=1234321,鐩镐俊浣犲凡缁忕湅鍑鸿寰嬫潵浜嗭紝閭ｄ箞绗竴棰樺氨寰堝ソ瑙ｅ喅浜嗭紝222222脳555555=2脳111111脳5脳111111 =2脳5脳111111脳111111=10脳12345654321=123456543210.2锛2/(12脳14)=1/12-1/14 鍚岀悊:2/(14脳16)=1/14...
绛旓細=2+2+2+2+鈥︹+2+2(浠3-2002鍏2000涓暟锛屾墍浠ユ湁1000涓2)+2+1 =1000脳2+2+1 =2003 4锛5涓ら鍧囩敤鍒颁竴涓浆鎹㈠紡1/锛圓脳B锛=1/锛圔-A锛壝楋紙1/A-1/B锛夊1/15=1/锛3脳5锛=1/锛5-3锛壝楋紙1/3-1/5锛=1/2脳锛2/15锛=1/15鍙獙璇佷竴涓 4)(1脳2鍒嗕箣涓)+(2脳3鍒嗕箣涓...
绛旓細锛1锛2.64脳1.7-2.64脳0.7 =2.64脳锛1.7-0.7锛=2.64脳1 =2.64 锛2锛31.5脳1.07-3.15脳0.7 =3.15脳10.7-3.15脳0.7 =3.15脳锛10.7-0.7锛=3.15脳10 =31.5 锛3锛2.7脳5.7-2.7+5.3脳2.7 =2.7脳(5.7-1+5.3锛=2.7脳10 =27 锛4锛0.625梅0....
绛旓細锛1锛2.5*32*0.125 =锛2.5*4锛*锛8*0.125锛=10*1 =10 锛2锛3.5-7+6.5 =3.5+6.5-7 =3 锛3锛1.2脳2.5+0.8脳2.5 =2.5(1.2+0.8)=25 锛4锛8.9脳1.25-0.9脳1.25 =1.25(8.9-0.9)=10 锛5锛12.5脳7.4脳0.8 =12.5脳0.8脳7.4 =74 锛6锛6.5...
绛旓細骞虫柟宸叕寮忋
