四年级数学培优练习题(含答案) 四年级上册数学培优训练题
\u56db\u5e74\u7ea7\u6570\u5b66\u57f9\u4f18100\u5206\u7684\u7b54\u6848\u4e0b\u5217\u8c03\u67e5\u4e2d\uff0c\u54ea\u4e9b\u7528\u7684\u662f\u666e\u67e5\u65b9\u5f0f\uff0c\u54ea\u4e9b\u7528\u7684\u662f\u62bd\u6837\u8c03\u67e5\u65b9\u5f0f\uff1f
\uff081\uff09\u4e86\u89e3\u4e00\u6279\u7a7a\u8c03\u7684\u4f7f\u7528\u5bff\u547d\uff1b
\uff082\uff09\u51fa\u7248\u793e\u5ba1\u67e5\u4e66\u7a3f\u7684\u9519\u522b\u5b57\u7684\u4e2a\u6570\uff1b
\uff083\uff09\u8c03\u67e5\u5168\u7701\u5168\u6c11\u5065\u8eab\u60c5\u51b5\uff0e
\u3010\u7b54\u6848\u3011
\uff081\uff09\u62bd\u6837\u8c03\u67e5 \uff082\uff09\u666e\u67e5 \uff083\uff09\u62bd\u6837\u8c03\u67e5
\u4e3a\u4e86\u4e86\u89e3\u5bb6\u5ead\u65e5\u5e38\u751f\u6d3b\u6d88\u8d39\u60c5\u51b5\uff0c\u5c0f\u4eae\u8bb0\u5f55\u4e86\u4ed6\u5bb6\u4e00\u5e74\u4e2d7\u5468\u7684\u65e5\u5e38\u751f\u6d3b\u6d88\u8d39\u8d39\u7528\uff0e\u6570\u636e\u5982\u4e0b(\u5355\u4f4d\uff1a\u5143)\uff1a
230 l95 180 250 270 455 170
\u8bf7\u4f60\u4f30\u7b97\u4e00\u4e0b\u5c0f\u4eae\u5bb6\u5e73\u5747\u6bcf\u5e74(\u6bcf\u5e74\u630952\u5468\u8ba1\u7b97)\u7684\u65e5\u5e38\u751f\u6d3b\u6d88\u8d39\u603b\u8d39\u7528.
\u3010\u7b54\u6848\u3011
13000\u5143
\u67d0\u6821\u4e3a\u4e86\u4e86\u89e3\u521d\u4e00\u5e74\u7ea7\u540d\u5b66\u751f\u6bcf\u5929\u5b8c\u6210\u4f5c\u4e1a\u6240\u7528\u65f6\u95f4\u7684\u60c5\u51b5\uff0c\u4ece\u4e2d\u5bf9\u540d\u5b66\u751f\u6bcf\u5929\u5b8c\u6210\u4f5c\u4e1a\u6240\u7528\u65f6\u95f4\u8fdb\u884c\u4e86\u62bd\u67e5\uff0c\u8fd9\u4e2a\u95ee\u9898\u4e2d\u7684\u6837\u672c\u5bb9\u91cf\u662f_______.
\u3010\u7b54\u6848\u301120
\u60a0\u60a0:896.5\u00f7(10+1)
=896.5\u00f711
=81.5\u5143
\u4e50\u4e50:81.5\u00d710=815\u5143
绛旓細鍥犱负姣忛殧5灏忔椂鍋氫竴娆¤褰曪紝涓斿仛浜12娆¤褰曪紝鎵浠ヤ粠瀹為獙寮濮嬪埌鐜板湪杩囦簡5*12=60涓皬鏃 60/12=5 鎵浠12娆¤褰曡繃绋嬩腑鎸囬樀浠9杞簡5鍦 鎵浠ュ疄楠屽紑濮嬫椂鎸囬拡鎸囧悜浜9 鐢变簬棰樼洰闂殑鏄1娆″仛璁板綍鏄嚑鐐癸紝鎵浠ヤ粠9鐐瑰紑濮嬬疮璁℃椂闂达紝鍒5灏忔椂鍚庡仛浜嗙1娆¤褰 9+5-12=2 鎵浠ュ仛绗1娆¤褰曟椂鎸囬拡鎸囧悜2 ...
绛旓細搴旇鏄繖鏍凤細绗竴绉嶏細0.5+1=1.5锛堝厓锛夛紙涓鏋濆悍涔冮Θ锛屼竴鏋濈帿鐟帮級绗簩绉嶏細0.5+0.5+1=2锛堝厓锛夛紙涓ゆ灊搴蜂箖棣紝涓鏋濈帿鐟帮級绗笁绉嶏細0.5+0.5+0.5+1=2.5锛堝厓锛夛紙涓夋灊搴蜂箖棣紝涓鏋濈帿鐟帮級绗洓绉嶏細0.5+0.5+0.5+0.5+1+3锛堝厓锛夛紙鍥涙灊搴蜂箖棣紝涓鏋濈帿鐟帮級绗簲绉嶏細0.5+1+1=2.5锛堝厓...
绛旓細閭ｄ箞涓夊勾绾у鐢熸湁澶氬皯浜?缁冧範鍐屾湁澶氬皯鏈?2銆佸皬鏄庝拱浜嗕竴鏈婅叮鍛鏁板銆,浠栬鍒:濡傛灉姣忓ぉ鍋3棰,鍒欏墿涓16棰,濡傛灉姣忓ぉ鍋5棰,鍒欐渶鍚庝竴澶╁彧瑕佸仛1棰樸傞偅涔...涓婄綉鐧惧害鈥滄庝箞瑙ｂ,绗竴涓,杩涘幓鍚2涓囬亾濂ユ暟棰樺厤璐逛綋楠,鍚勭闅惧害杩樻湁绛旀鍜岃В棰樻濊矾,娉ㄥ唽灏辫兘鍋氫綔涓氭嬁绉垎鎹pad! 鐪熺殑鎶辨瓑4骞寸骇鐨勫彧鏈32閬,浣嗘诲叡80閬...
绛旓細锛1锛66脳21+19脳21+85脳19 =66脳21+19脳21+85脳锛21-2锛=66脳21+19脳21+85脳21-85脳2 =锛66+19+85锛壝21-85脳2 =160脳21-170 =3190 (2)36脳111+888脳8 =36脳111+111脳(8脳8)=36脳111+111脳64 =111脳锛64+36锛=11100 (3)99脳99+199 =99脳(100-1)+199 =9900-99...
绛旓細1.45+15脳6= 135 2.250梅5脳8=400 3.6脳5梅2脳4=60 4.30脳3+8=98 5.400梅4+20脳5= 200 6.10+12梅3+20=34 7.(80梅20+80)梅4=21 8.70+(100-10脳5)=120 9.360梅40= 9 10.40脳20= 800
绛旓細40X5=200 50X5=250 250-200=50 70-50=20 绛旓細鍘熸潵鐨勮繖涓暟鏄20銆傝繖鏄叏閮ㄧ殑浜
绛旓細1. 66x21+19x21+85x19 = 21x2+19x2+66x85 =(22+38)+5610 =60+5610=5670
绛旓細鍒嗘瀽锛10.35梅(10-1) = 1.15 杩欎釜鍥炵瓟鏄噯纭殑銆傚洜涓虹幇鍦ㄦ瘮杩囧幓澶氫簡10.35鍏冿紝鐩稿搴旂殑涔熷浜嗭細10-1=9锛堝).鐢10.35闄や互9灏辨槸涓鍊嶆暟銆備竴鍊嶆暟涔熷氨鏄師鏉ョ殑鏁帮紝鍗冲皬鏁扮偣浣嶉敊涔嬪墠鐨勬暟銆
绛旓細绠楀紡锛6.28闄や互3.4闄や互2绛変簬1銆愮背銆 1鍑0.75绛変簬0.25銆愮背銆
