小升初数学简算题目
\u5c0f\u5347\u521d\u96be\u5ea6\u7684\u6570\u5b66\u8ba1\u7b97\u9898\uff08\u7b80\u7b97\uff09\u3002\u8981\u8fc7\u7a0b4.85\u4e58\uff080.17+0.83\uff09
4\u4e5825\u4e580.86
125\u4e588\u966450
7.6\u4e58\u4e8c\u5206\u4e4b\u4e00\u96641.9\uff081-0\uff09
1111\u4e58\uff089\u4e587+37\uff09
1998\u4e58\uff080.37-0.19+0.82\uff09
1-\uff082\u5206\u4e4b\u4e00\u52a03\u5206\u4e4b\u4e00\uff09-\uff084\u5206\u4e4b\u4e00\u52a05\u5206\u4e4b\u4e00\uff09
31\u53c8\u4e09\u5206\u4e4b\u4e00X41\u53c8\u4e8c\u5206\u4e4b\u4e00\u51cf\u53bb11\u53c8\u4e09\u5206\u4e4b\u4e00X41\u53c8\u4e8c\u5206\u4e4b\u4e00\u51cf\u53bb41.5X20
(94/3)*(83/2)-(34/3)*(83/2)-41.5*20 41.5=83/2
=(83/2)*(94/3-34/3-20)
=0
7/12\u51cf\u53bb9/20+11/30\u51cf\u53bb13/42+15/56\u51cf\u53bb17/72+19/90
7/12-9/20+11/30-13/42+15/56-17/72+19/90
=(1/3+1/4)-(1/4+1/5)+(1/5+1/6)-(1/6+1/7)+(1/7+1/8)-(1/8+1/9)+(1/9+1/10)
=1/3+1/10
=13/30
\u7b2c\u4e00\u9898\u7528\u5206\u914d\u5f8b\u6765\u505a\uff0c\u4e5f\u5c31\u662f\u5408\u5e76\u540c\u7c7b\u9879\u3002
\u7b2c\u4e8c\u9898\u7528\u5217\u9879\u6cd5\u30027/12=1/3+1/4
11/30=1/5+1/6\u2026\u2026
\u2234\u539f\u5f0f=1/3+1/4-1/4-1/5+1/5+1/6-1/6-1/7+1/7+1/8-1/9+1/9+1/10(\u5168\u90e8\u62b5\u6d88)
=1/3+1/10
=13/30
\u5316\u5047\u5206\u5f0f\u4e3a\u4ee3\u5206\u5f0f
\u5148\u901a\u5206\u540e\u8ba1\u7b97
145×929292/292929-460×458/459
=145x(92x10101)/(29x10101)-460x(1-1/459)
=145x92/29 -460x1+460x1/459
=5x92-460+460/459
=460-460+460/459
=460/459
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145×929292/292929－460×458/459
＝145×(92×10101)/(29×10101)－(459＋1)×458/459
＝145×92/29－459×458/459－458/459
＝5×92－458－458/459
＝460－458－458/459
＝2－458/459
＝1又1/459
答：原式=145*（92*10101）/(29*10101)-460*458/459
=460-460*458/459
=460*(1-458/459)
=460*1/459
=1又1/459
145×929292/292929-460×458/459
=145x(92x10101)/(29x10101)-460x(1-1/459)
=145x92/29 -5x92+460/459
=460-460+460/459
=460/459
绛旓細49鍙7/8*锛-4锛夛紳锛50-1/8锛*锛-4锛夛紳-200+1/2 锛濓紞199.5 1/5*锛-75鍙5/6锛夛紳1/5*锛-75-5/6锛夛紳-25-1/6 锛濓紞25鍙1/6 (-9鍙24/25)*(-125)锛濓紙-10+1/25锛*锛堬紞125锛夛級锛1250-5 =1245
绛旓細锛987*655-321锛/锛666+987*654锛*4.5/0.25 =锛987*654+987-321锛/锛666+987*654锛*锛4.5脳4锛=锛987*654+666锛/锛666+987*654锛*18 =18 2012脳锛1-浜屽垎涔嬩竴锛壝楋紙1-涓夊垎涔嬩竴锛壝楋紙1-鍥涘垎涔1锛壝椻︹γ楋紙1-浜岄浂涓浜屽垎涔嬩竴锛=2012脳1/2脳2/3脳3/4脳鈥︹γ2011/2012 ...
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绛旓細=145x(92x10101)/(29x10101)-460x(1-1/459)=145x92/29 -460x1+460x1/459 =5x92-460+460/459 =460-460+460/459 =460/459 濡傛灉鏈鏈変粈涔堜笉鏄庣櫧鍙互杩介棶锛屽鏋滄弧鎰忚鐐瑰嚮鈥滈変负婊℃剰绛旀鈥濆鏋滄湁鍏朵粬闂璇烽噰绾虫湰棰樺悗鍙﹀彂鐐瑰嚮鍚戞垜姹傚姪锛岀瓟棰樹笉鏄擄紝璇疯皡瑙ｏ紝璋㈣阿銆傜瀛︿範杩涙锛
绛旓細=1/3+1/10 =13/30 绗竴棰樼敤鍒嗛厤寰嬫潵鍋氾紝涔熷氨鏄悎骞跺悓绫婚」銆傜浜岄鐢ㄥ垪椤规硶銆7/12=1/3+1/4 11/30=1/5+1/6鈥︹︹埓鍘熷紡=1/3+1/4-1/4-1/5+1/5+1/6-1/6-1/7+1/7+1/8-1/9+1/9+1/10(鍏ㄩ儴鎶垫秷)=1/3+1/10 =13/30 鍖栧亣鍒嗗紡涓轰唬鍒嗗紡 鍏堥氬垎鍚庤绠 ...
绛旓細1.绠绠锛6鍒嗭級鈶9 锛嶏紙3 锛0.4锛 鈶1.8脳25% 锛2.2脳25锛 =9-3.4 =(1.8+2.2)x25 =5.6 =4x25 =1 2锛庤劚寮忚绠楋紙12鍒嗭級(1)6.25锛40梅16脳2.5 =6.25-2.5x2.5 =6.25-6.25 =0 鈶2 梅[5 锛4.5脳锛20锛咃紜80% 锛塢=2/(5.4-5x1)=2/0.4 =5 3銆...
