在一道减法算式中，被减数、减数与差相加的和是178，减数是53，差是多少？ 在一道减法算式中，把被减数，减数，差加起来和是800,你知道...
\u5728\u4e00\u4e2a\u51cf\u6cd5\u7b97\u5f0f\u4e2d\uff0c\u88ab\u51cf\u6570\u51cf\u6570\uff0c\u5dee\u76f8\u52a0\u7684\u548c\u662f178\uff0c\u88ab\u51cf\u6570\u662f\u591a\u5c11\uff1f\u5982\u679c\u51cf\u6570\u662f23\uff0c\u5dee\u662f\u591a\u5c11\uff1f\u7b97\u5f0f\u89e3\uff1a\u5df2\u77e5\u5728\u4e00\u4e2a\u51cf\u6cd5\u7b97\u5f0f\u4e2d\uff0c\u88ab\u51cf\u6570\uff0c\u51cf\u6570\uff0c\u5dee\u76f8\u52a0\u7684\u548c\u662f178\uff0c
\u5f97\u88ab\u51cf\u6570+\u51cf\u6570+\u5dee=178
\u4e14\u88ab\u51cf\u6570-\u51cf\u6570=\u5dee\uff0c
\u5f97\u88ab\u51cf\u6570=\u51cf\u6570+\u5dee
\u5f97\u88ab\u51cf\u6570+\u88ab\u51cf\u6570=178
\u88ab\u51cf\u6570\u00d72=178
\u88ab\u51cf\u6570=178\u00f72
\u88ab\u51cf\u6570=89
\u4e14\u51cf\u6570\u662f23\uff0c
\u5f97\u5dee=\u88ab\u51cf\u6570-\u51cf\u6570
=89-23
=66
\u7b54\uff1a\u88ab\u51cf\u6570\u662f89\uff0c\u5dee\u662f66.
\u88ab\u51cf\u6570,\u51cf\u6570\u4e0e\u5dee\u7684\u548c\u662f800,\u88ab\u51cf\u6570\u662f\u591a\u5c11?
\u88ab\u51cf\u6570=\u51cf\u6570+\u5dee
\u88ab\u51cf\u6570+\u51cf\u6570+\u5dee=800
\u88ab\u51cf\u6570X2=800
\u88ab\u51cf\u6570=800\u00f72
\u88ab\u51cf\u6570=400
\u6216\u8005\uff08\u88ab\u51cf\u6570\uff09\u25b3-\uff08\u51cf\u6570\uff09\u25a1=\uff08\u5dee\uff09\u25cb
\u6839\u636e\u9898\u76ee\u5173\u7cfb\uff1a\uff08\u88ab\u51cf\u6570\uff09\u25b3+\uff08\u51cf\u6570\uff09\u25a1+\uff08\u5dee\uff09\u25cb=800
\u5373\u7cfb2\uff08\u88ab\u51cf\u6570\uff09\u25b3=800
\u6240\u4ee5\uff08\u88ab\u51cf\u6570\uff09\u25b3=400
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\u6570\u5b66\u662f\u4eba\u7c7b\u5bf9\u4e8b\u7269\u7684\u62bd\u8c61\u7ed3\u6784\u4e0e\u6a21\u5f0f\u8fdb\u884c\u4e25\u683c\u63cf\u8ff0\u7684\u4e00\u79cd\u901a\u7528\u624b\u6bb5\uff0c\u53ef\u4ee5\u5e94\u7528\u4e8e\u73b0\u5b9e\u4e16\u754c\u7684\u4efb\u4f55\u95ee\u9898\uff0c\u6240\u6709\u7684\u6570\u5b66\u5bf9\u8c61\u672c\u8d28\u4e0a\u90fd\u662f\u4eba\u4e3a\u5b9a\u4e49\u7684\u3002\u4ece\u8fd9\u4e2a\u610f\u4e49\u4e0a\uff0c\u6570\u5b66\u5c5e\u4e8e\u5f62\u5f0f\u79d1\u5b66\uff0c\u800c\u4e0d\u662f\u81ea\u7136\u79d1\u5b66\u3002\u4e0d\u540c\u7684\u6570\u5b66\u5bb6\u548c\u54f2\u5b66\u5bb6\u5bf9\u6570\u5b66\u7684\u786e\u5207\u8303\u56f4\u548c\u5b9a\u4e49\u6709\u4e00\u7cfb\u5217\u7684\u770b\u6cd5\u3002
\u5728\u4eba\u7c7b\u5386\u53f2\u53d1\u5c55\u548c\u793e\u4f1a\u751f\u6d3b\u4e2d\uff0c\u6570\u5b66\u53d1\u6325\u7740\u4e0d\u53ef\u66ff\u4ee3\u7684\u4f5c\u7528\uff0c\u540c\u65f6\u4e5f\u662f\u5b66\u4e60\u548c\u7814\u7a76\u73b0\u4ee3\u79d1\u5b66\u6280\u672f\u5fc5\u4e0d\u53ef\u5c11\u7684\u57fa\u672c\u5de5\u5177\u3002
被减数+减数+差=178
即2（减数+差）=178
减数+差=178÷2=89
差=89-53=36
社被减数为X,则，X+X-53+53=178,解得，X=89,差=89-53=36
绛旓細棰樹腑: 宸=12.3锛琚噺鏁+鍑忔暟+宸=38锛屾墍浠ワ紝琚噺鏁帮紞鍑忔暟=12.3锛屸憼 琚噺鏁+鍑忔暟=25.7锛屸憽 鈶+鈶★紝琚噺鏁=19 鈶★紞鈶狅紝鍑忔暟=6.7
绛旓細琚噺鏁銆佸噺鏁板拰宸笁鑰呬箣鍜300锛屼笖宸槸43锛屽彲鐭ヨ鍑忔暟涓庡噺鏁颁箣鍜屾槸300-43=257锛屽悓鏃讹紝涓夎呬箣闂磋繕鏈夐殣鍚叧绯伙細琚噺鏁-鍑忔暟=宸=43 鍥犺鍑忔暟+鍑忔暟涓庤鍑忔暟-鍑忔暟鐩告瘮锛屽浜2涓鍑忔暟锛鎵浠ュ彲寰楀噺鏁版槸锛257-43锛壝2=107锛岃繘鑰屽彲浠ユ眰鍑鸿鍑忔暟銆傝В绛旓細锛300-43-43锛壝2 =锛300-86锛壝2 =214梅2 =107鈥︹...
绛旓細鍦涓閬撳噺娉绠楀紡涓,琚噺鏁+鍑忔暟+宸=400,鍏朵腑鍑忔暟鏄57,琚噺鏁版槸(200 ),宸槸(143 ).宸=琚噺鏁-鍑忔暟=琚噺鏁-57 琚噺鏁+57+锛堣鍑忔暟-57锛=440 琚噺鏁*2=400 琚噺鏁=200
绛旓細鍑忔暟鏄6.7銆傚凡鐭鍦ㄤ竴閬撳噺娉曠畻寮忎腑锛琚噺鏁+鍑忔暟+宸=38锛屽樊=12.3锛屼笖琚噺鏁-鍑忔暟=宸紝寰楄鍑忔暟=鍑忔暟+宸紝鍒欙紙鍑忔暟+宸級+鍑忔暟+宸=38銆2脳锛堝噺鏁+宸級=38 2脳锛堝噺鏁+12.3锛=38 鍑忔暟+12.3=38梅2 鍑忔暟+12.3=19 鍑忔暟=19-12.3 鍑忔暟=6.7 ...
绛旓細瑙ｏ細宸茬煡琚噺鏁-鍑忔暟=宸紝寰楄鍑忔暟=鍑忔暟+宸紝寰鍦ㄤ竴閬撳噺娉曠畻寮忎腑锛岃鍑忔暟+鍑忔暟+宸 =琚噺鏁+琚噺鏁 =琚噺鏁懊2 鍗宠鍑忔暟锛屽噺鏁帮紝宸殑鍜屾槸琚噺鏁扮殑2鍊嶃
绛旓細鍗宠閬鍑忔硶绠楀紡鍒楀紡涓猴細79-38=41 瑙ｆ瀽锛1銆佹牴鎹鎰忥紝鏁寸悊浠ヤ笅鍏紡 鍏紡锛氳鍑忔暟-鍑忔暟=宸 瀛楁瘝琛ㄧず锛欰-B=C 1銆佹牴鎹鎰忓緱锛岃鍑忔暟銆佸噺鏁般佸樊涓変釜鏁扮殑鍜屾槸158锛屾墍浠ユ湁锛欰+B+C=158 2銆佸凡鐭ュ樊鏄41锛屾牴鎹瓵-B=C,鎵浠ワ細C=41 3銆佹妸C=41浠ｅ叆A+B+C=158涓紝鍙互姹傚緱(A+B)锛欰+B+41=158...
绛旓細琚噺鏁=400 鎴栬咃紙琚噺鏁帮級鈻-锛堝噺鏁帮級鈻=锛堝樊锛夆棆 鏍规嵁棰樼洰鍏崇郴锛氾紙琚噺鏁帮級鈻+锛堝噺鏁帮級鈻+锛堝樊锛夆棆=800 鍗崇郴2锛堣鍑忔暟锛夆柍=800 鎵浠ワ紙琚噺鏁帮級鈻=400 鏁板[鑻辫锛歮athematics锛屾簮鑷彜甯岃厞璇嘉肝肺嘉憋紙m谩th膿ma锛夛紱缁忓父琚缉鍐欎负math鎴杕aths]锛屾槸鐮旂┒鏁伴噺銆佺粨鏋勩佸彉鍖栥佺┖闂翠互鍙婁俊鎭瓑姒傚康鐨勪竴闂...
绛旓細琚噺鏁 = 400 濡傛灉鍑忔暟 = 250 锛 宸 = 琚噺鏁 - 鍑忔暟 = 400 - 250 = 150 鍑忔硶鍏紡 1銆佽鍑忔暟-鍑忔暟=宸 2銆佸樊+鍑忔暟=琚噺鏁 3銆佽鍑忔暟-宸=鍑忔暟 鍑忔硶鐩稿叧鎬ц川 1銆佸弽浜ゆ崲鐜囷細鍑忔硶鏄弽浜ゆ崲鐨勶紝濡傛灉a鍜宐鏄换鎰忎袱涓暟瀛楋紝閭ｄ箞 锛坅-b)=-(b-a)2銆佸弽缁撳悎寰嬶細鍑忔硶鏄弽缁撳悎鐨勶紝褰撹瘯鍥鹃噸鏂板畾涔...
绛旓細璁惧噺鏁颁负X锛屽垯宸负X+31锛屽洜涓哄噺鏁锛岃鍑忔暟锛宸笁涓暟鐨勫拰涓134锛屾墍浠ヨ鍑忔暟=134-X-X-31=101-2X銆傚師寮忎负锛101-2X-X=X+31锛屽緱鍑4X=70,X=15 鎵浠ヨ繖涓鍑忔硶涓猴細71-15=46
绛旓細(琚噺鏁+鍑忔暟)+(琚噺鏁-鍑忔暟)=50 琚噺鏁=50梅2=25 宸=25-11.7=13.3
