2022年四年級(jí)數(shù)學(xué)下冊(cè)第5單元認(rèn)識(shí)方程核心考點(diǎn)突破卷11認(rèn)識(shí)方程及解方程北師大版

歡迎閱讀本文檔，希望本文檔能對(duì)您有所幫助！/r/n歡迎閱讀本文檔，希望本文檔能對(duì)您有所幫助！/r/n歡迎閱讀本文檔，希望本文檔能對(duì)您有所幫助！/r/n歡迎閱讀本文檔，希望本文檔能對(duì)您有所幫助！/r/n歡迎閱讀本文檔，希望本文檔能對(duì)您有所幫助！/r/n歡迎閱讀本文檔，希望本文檔能對(duì)您有所幫助！/r/n核心考點(diǎn)突破/r/n卷/r/n11/r/n．/r/n認(rèn)識(shí)方程及解方程/r/n一、認(rèn)真審題，填一填。(每小題5分，共20分)/r/n1/r/n．/r/nx/r/n＝()是方程2/r/nx/r/n－6＝12的解。/r/n2/r/n．每本書(shū)/r/na/r/n元，每支筆/r/nb/r/n元，買(mǎi)3本書(shū)和2支筆，一共需要/r/n()元。根據(jù)這個(gè)式子，當(dāng)/r/na/r/n＝4.5，/r/nb/r/n＝1.8時(shí)，一共需要/r/n()元。/r/n3/r/n．若方程2.5/r/nx/r/n＋2/r/nm/r/n＝31的解是/r/nx/r/n＝6，則/r/nm/r/n的值是()。/r/n4/r/n．若方程3×(4＋/r/nx/r/n)＝54與3/r/nx/r/n－5/r/na/r/n＝7的解相同，則/r/na/r/n的值是()。/r/n二、仔細(xì)推敲，選一選。(每小題4分，共12分)/r/n1/r/n．下列方程中，()的解與方程4/r/nx/r/n＋5＝6的解相同。/r/nA．4/r/nx/r/n＝11/r/n /r/n /r/n /r/nB．4/r/nx/r/n＝1/r/n /r/n /r/n /r/nC．9/r/nx/r/n＝11/r/n2/r/n．用方程3/r/nx/r/n－8＝28能解決的實(shí)際問(wèn)題是()。/r/nA．果園里有28棵梨樹(shù)，梨樹(shù)比蘋(píng)果樹(shù)的3倍少8棵，果園里有多少棵蘋(píng)果樹(shù)/r/nB．文體店里有28個(gè)足球，籃球的個(gè)數(shù)比足球個(gè)數(shù)的3倍少8個(gè)，文體店里有多少個(gè)籃球/r/nC．一共要做28個(gè)零件，王叔叔連續(xù)做了3天，還剩下8個(gè)沒(méi)有完成，王叔叔平均每天做多少個(gè)零件/r/n3/r/n．根據(jù)下圖所列的方程正確的是()。/r/nA．2/r/nb/r/n＋15＝100/r/nB．100＋15＝2/r/nb/r/nC．2/r/nb/r/n－15＝100/r/n三、解方程。(每小題6分，共24分)/r/nx/r/n＋/r/n9.87＝13.43/r/n /r/n2/r/ny/r/n－3.5＝30.5/r/n6(/r/nx/r/n－1.5)＝60/r/n /r/n /r/n /r/n /r/n3.5＋2/r/nx/r/n＝15.5/r/n四、按要求做一做。(共20分)/r/n1/r/n．看圖列方程，并求出方程的解。(每小題4分，共12分)/r/n(1)/r/n(2)/r/n(3)/r/n2/r/n．根據(jù)下列程序先填空，再列出方程，并求出/r/nx/r/n。(每小題4分，共8分)/r/n(1)/r/n(2)/r/n五、/r/n聰明的你，答一答，用方程解決問(wèn)題。/r/n(共24分)/r/n1/r/n．堅(jiān)果中富含多種營(yíng)養(yǎng)物質(zhì)，張阿姨買(mǎi)了2千克松子，每千克45元，又買(mǎi)了3千克核桃，她查看手機(jī)支付賬單發(fā)現(xiàn)核桃的總價(jià)剛好和松子的總價(jià)相等，核桃每千克多少元？(12分)/r/n2/r/n．/r/n“中歐班列”是連接“一帶一路”沿線國(guó)家強(qiáng)有力的紐帶，而西安是這條紐帶上一個(gè)重要的樞紐站。/r/n2021年以來(lái)(截至2021年2月12日)，中歐班列(西安)已累計(jì)開(kāi)出237列，比返程班列的2倍少87列。這段時(shí)間內(nèi)累計(jì)返程班列有多少列？/r/n(12分)/r/n

/r/n答案/r/n一、1．/r/n9/r/n2．/r/n3/r/na/r/n＋2/r/nb/r/n17.1/r/n3/r/n．8/r/n4．/r/n7/r/n二、/r/n1/r/n．B/r/n2/r/n．A/r/n3/r/n．A/r/n三、/r/nx/r/n＋9.87＝13.43/r/n解：/r/nx/r/n＝13.43－9.87/r/nx/r/n＝3.56/r/n2/r/ny/r/n－3.5＝30.5/r/n解：2/r/ny/r/n＝30.5＋3.5/r/n2/r/ny/r/n＝34/r/ny/r/n＝17/r/n6(/r/nx/r/n－1.5)＝60/r/n解：/r/nx/r/n－1.5＝60÷6/r/nx/r/n－1.5＝10/r/nx/r/n＝10＋1.5/r/nx/r/n＝11.5/r/n3/r/n./r/n5＋2/r/nx/r/n＝15.5/r/n解：2/r/nx/r/n＝15.5－3.5/r/n2/r/nx/r/n＝12/r/nx/r/n＝12÷2/r/nx/r/n＝6/r/n四、/r/n1．/r/n(1)20＋/r/nx/r/n＝100/r/n解：/r/nx/r/n＝100－20/r/nx/r/n＝80/r/n(2)/r/nx/r/n－20＝48/r/n解：/r/nx/r/n＝48＋20/r/nx/r/n＝68/r/n(3)4/r/nx/r/n＋5.6＝25.6/r/n解：4/r/nx/r/n＝25.6－5.6/r/n4/r/nx/r/n＝20/r/nx/r/n＝5/r/n2/r/n．(1)7/r/nx/r/n7/r/nx/r/n＋16＝65/r/n解：7/r/nx/r/n＝49/r/nx/r/n＝7/r/n(2)6/r/nx/r/n6/r/nx/r/n－3＝21/r/n解：6/r/nx/r/n＝24/r/nx/r/n＝4/r/n五、/r/n1/r/n．解：設(shè)核桃每千/r/n克/r/nx/r/n元。/r/n3/r/nx/r/n＝2×45/r/n3/r/nx/r/n＝90/r/nx/r/n＝30/r/n答：核桃每千克30元。/r/n2/r/n．解：設(shè)這段時(shí)間內(nèi)累