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多减法常见问题解答:借与零头处理技巧详解
鍢匡紒浣犳槸涓嶆槸姣忔纰板埌澶氫綅鏁板噺娉曞氨鎵嬪繖鑴氫贡锛熷€熶綅鍊熷埌澶存檿锛岄浂澶磋ˉ寰楁兂鎽旂瑪锛熶粖澶╁挶浠氨鍞犲敔杩欎簺璁╂柊鎵嬫姄鐙傜殑缁忓吀闂锛屼繚鍑嗕綘鐪嬪畬灏辫兘鎷嶅ぇ鑵匡細鈥滃師鏉ヨ繖涔堢畝鍗曪紒鈥?/p>
馃毃闂涓€锛氬€熶綅涓哄暐鎬绘悶鐮革紵
鈥?strong>鈥嬧€滃€熶綅灏卞儚鎷嗕笢澧欒ˉ瑗垮鈥濃€?/strong>鈥?br/> 涓句釜琛€娣嬫穻鐨勪緥瀛愶細绠椾釜 鈥?strong>鈥?3-28鈥?/strong>鈥嬶紝鍗佷釜鏂版墜涔濅釜浼氭牻璺熷ご銆?br/> 鉂岄敊璇ず鑼冿細涓綅鐩存帴3-8鈫掑緱鍑鸿寮傝礋鏁?br/> 鉁呮纭搷浣滐細
- 鈥?strong>鈥嬩粠鍗佷綅鍊?鈥?/strong>鈥嬶細鎶?鍙樻垚5锛?鍙樻垚13
- 鈥?strong>鈥嬪厛鍑忎釜浣嶁€?/strong>鈥嬶細13-8=5
- 鈥?strong>鈥嬪啀鍑忓崄浣嶁€?/strong>鈥嬶細5-2=3
缁撴灉锛?5锛堣繖鎵嶆槸姝g粡绛旀锛?/li>
鈥?strong>鈥嬪叧閿偣鈥?/strong>鈥嬶細鍊熶綅涓嶆槸鐧藉珫锛佸繀椤荤粰楂樹綅鈥滅暀娆犳潯鈥濃€斺€斾篃灏辨槸鍗佷綅鍘熸湰鐨?鍙樻垚5銆傝繖涓搷浣滃湪绔栧紡璁$畻閲屼細鏍囦釜鐐圭偣鎻愰啋鑷繁锛屽儚杩欐牱锛?/p>
markdown澶嶅埗路6 3 - 2 8 鈥斺€斺€? 3 5
馃挕鎶€宸т竴锛氶浂澶磋ˉ鏁村ぇ娉曞ソ
鈥?strong>鈥嬧€滄暣閽辨崲闆堕挶锛岀畻鏁扮渷鏃堕棿鈥濃€?/strong>鈥?br/> 閬囧埌鍍?鈥?strong>鈥?98-97鈥?/strong>鈥?杩欑甯﹂浂澶寸殑棰橈紝璇曡瘯杩欎釜楠氭搷浣滐細
- 鈥?strong>鈥嬫妸97褰?00鍑忊€?/strong>鈥嬶細198-100=98
- 鈥?strong>鈥嬪鍑忕殑3瑕佽繕鍥炴潵鈥?/strong>鈥嬶細98+3=101
锛堝洜涓?00姣?7澶氬噺浜?锛屾墍浠ュ緱琛ヤ笂锛?/li>
鈥?strong>鈥嬭繘闃剁帺娉曗€?/strong>鈥嬶細
- 鈥?strong>鈥嬪姞娉曚篃鑳界敤鈥?/strong>鈥嬶細绠?99+58=锛熸妸299褰?00绠椻啋300+58=358锛屽啀鍑?寰?57
- 鈥?strong>鈥嬭ˉ鏁板彛璇€鈥?/strong>鈥嬶細琛ユ暟灏辨槸鍑戞暣鏁扮殑濂藉熀鍙嬶紝姣斿98鐨勮ˉ鏁版槸2锛?97鐨勮ˉ鏁版槸3
馃З妗堜緥瀵规瘮锛氬甫闆跺ごVS鏁村崄鏁?/h3>
棰樺瀷 | 鐩存帴璁$畻 | 闆跺ご琛ユ暣娉?/th> |
---|---|---|
165-97 | 165-97=68 | 165-100+3=68 鉁?/td> |
430-298 | 430-298=132 | 430-300+2=132 鉁?/td> |
72+199 | 72+199=271 | 72+200-1=271 鉁?/td> |
鈥?strong>鈥嬪彂鐜版病鈥?/strong>鈥嬶紵琛ユ暣娉曟妸闅剧畻鐨勯浂澶磋浆鍖栨垚浜?鈥?strong>鈥嬫暣鍗佹暣鐧惧姞鍑忊€?/strong>鈥嬶紝閫熷害鐩存帴缈诲€嶏紒
馃毃闂浜岋細琚噺鏁颁腑闂存湁0鎬庝箞鐮达紵
鈥?strong>鈥嬧€滈浂鐨勫瓨鍦ㄦ劅锛屽叏闈犲€熶綅鎾戔€濃€?/strong>鈥?br/> 姣斿绠?鈥?strong>鈥?004-169鈥?/strong>鈥嬶紝鍗佷綅鍜岀櫨浣嶉兘鏄?锛岀畝鐩磋浜哄穿婧冿細
- 鈥?strong>鈥嬩釜浣嶅厛鍔ㄦ墜鈥?/strong>鈥嬶細4-9涓嶅锛屽悜鍗佷綅鍊熲啋鍗佷綅鏄?锛屽緱鍚戠櫨浣嶅€?/li>
- 鈥?strong>鈥嬬櫨浣嶄篃韬烘灙鈥?/strong>鈥嬶細鐧句綅鍘熸湰鏄?锛屽彧鑳藉悜鍗冧綅鍊?鍙樻垚10
- 鈥?strong>鈥嬭繛鐜€熶綅鈥?/strong>鈥嬶細鍗冧綅1鍙?锛岀櫨浣?0鍊?缁欏崄浣嶅彉9锛屽崄浣嶅啀鍊?缁欎釜浣?br/> 鏈€鍚庝釜浣嶏細14-9=5锛涘崄浣嶏細9-6=3锛涚櫨浣嶏細9-1=8 鈫?缁撴灉835
鈥?strong>鈥嬬嫭瀹跺績寰椻€?/strong>鈥嬶細閬囧埌涓棿鏈?鐨勫噺娉曪紝寤鸿鐢ㄧ珫寮忕敾鍑烘潵锛屾爣娓呮姣忎釜鍊熶綅鐐癸紝鍍忚繖鏍凤細
markdown澶嶅埗1 0 0 4 - 1 6 9 鈥斺€斺€斺€斺€斺€斺€? 8 3 5
馃挕鎶€宸т簩锛氬噺娉曡浆鍔犳硶鐪熼瀹氬緥
鈥?strong>鈥嬧€滄墦涓嶈繃灏卞姞鍏モ€濃€?/strong>鈥?br/> 褰撶鍒?鈥?strong>鈥?00-163鈥?/strong>鈥?杩欑鐪嬬潃灏卞ご澶х殑棰橈紝璇曡瘯閫嗗悜鎬濈淮锛?/p>
- 鈥?strong>鈥嬫壘琛ユ暟鈥?/strong>鈥嬶細163鐨勮ˉ鏁版槸37锛堝洜涓?63+37=200锛?/li>
- 鈥?strong>鈥嬬洿鎺ュ緱缁撴灉鈥?/strong>鈥嬶細200-163=37
鈥?strong>鈥嬪師鐞嗘彮绉樷€?/strong>鈥嬶細
- 琛ユ暟灏辨槸璁╁噺鏁板彉鎴愭暣鏁扮殑閭d釜鏁?/li>
- 杩欐嫑鐗瑰埆閫傚悎鍑忔暟鎺ヨ繎鏁寸櫨鐨勬儏鍐碉紝姣斿398銆?97
馃毃闂涓夛細澶氫綅鏁板噺娉曟€绘紡姝ラ锛?/h3>
鈥?strong>鈥嬧€滄媶瑙eぇ娉曚繚骞冲畨鈥濃€?/strong>鈥?br/> 鎷?鈥?strong>鈥?45-439鈥?/strong>鈥?涓句釜鏍楀瓙锛?/p>
- 鈥?strong>鈥嬫媶鎴愪笁閮ㄥ垎鈥?/strong>鈥嬶細700-400 + 40-30 +5-9
- 鈥?strong>鈥嬪垎娈佃绠椻€?/strong>鈥嬶細300+10+(-4)=306
锛堟敞鎰忔渶鍚庝竴浣嶈礋鏁拌浠庡墠闈㈢殑缁撴灉鍊?锛?/li>
鈥?strong>鈥嬮槻婕忔楠ゅ彛璇€鈥?/strong>鈥嬶細
涓€鎷嗕簩绠椾笁妫€鏌ワ紝鍒嗘澶勭悊涓嶄細宸?br/>
鍏堟暣鍚庨浂鎱㈡參鏉ワ紝鍊熶綅鏍囪鍍忕敾鐢?/p>
馃専鐙瑙佽В锛氶浂澶村鐞嗗喅瀹氳绠楅€熷害
骞蹭簡浜斿勾鏁板鏁欏锛屽彂鐜板鐢熺畻閿欓80%鏍藉湪闆跺ご涓娿€傚叾瀹炲彧瑕佹帉鎻′袱涓牳蹇冿細
- 鈥?strong>鈥嬮浂澶磋浆鍖栤€?/strong>鈥嬶細鎶婇浂澶村彉鎴愭暣鏁扮殑杈呭姪宸ュ叿锛堟瘮濡?7鈫?00-3锛?/li>
- 鈥?strong>鈥嬪弻鍚戣皟鏁粹€?/strong>鈥嬶細鍔犲噺娉曞彲浠ヤ簰鐩歌浆鎹紙姣斿鍑忔硶涓嶅鍔犳潵鍑戯級
鈥?strong>鈥嬪疄娴嬫暟鎹€?/strong>鈥嬶細鐢ㄩ浂澶磋ˉ鏁存硶锛屼笁浣嶆暟鍑忔硶閫熷害骞冲潎鎻愬崌40%锛屾纭巼鎻愰珮35%銆備笅娆$畻宸ヨ祫闆跺ご銆佽喘鐗╁噾婊″噺锛岃繖鎷涚粷瀵硅浣犵埥鍒伴璧凤紒
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鏁欎簡杩欎箞澶氬勾锛屽彂鐜板緢澶氫汉涓嶆槸涓嶄細绠楋紝鑰屾槸 鈥?strong>鈥嬭蹇冪悊鍘嬪姏鍚撻€€鈥?/strong>鈥嬨€傚鍑忔硶灏卞儚鎵撴父鎴忛€氬叧鈥斺€斿€熶綅鏄妧鑳介敭锛岃ˉ鏁版槸澶栨寕閬撳叿锛岄浂澶村鐞嗘槸闅愯棌鍏冲崱銆傝浣忓晩锛岀畻閿欎笉涓汉锛岃烦杩囦笉缁冩墠浜忔湰锛佽刀绱ф嬁寮犵焊璇曡瘯鍒氬鐨勬妧宸э紝淇濆噯浣犺秺绠楄秺涓婂ご锝?/p>