PAGE/r/n4/r/n/r/n4/r/n頁/r/n2021-2022/r/n考試數學試卷/r/n學/r/n:/r/n /r/n姓名/r/n班級/r/n考號/r/n /r/n一、口算和估算/r/n1/r/n．直接寫出得數。/r/n1949/r/n＋/r/n72/r/n＝/r/n850÷50/r/n＝/r/n二、豎式計算/r/n2/r/n．豎式計算。/r/n2021/r/n－/r/n1921/r/n＝ /r/n38×40/r/n＝/r/n7200÷900/r/n＝ /r/n240×50/r/n＝/r/n420÷42/r/n＝/r/n298×50≈/r/n500×20/r/n＝/r/n718÷90≈/r/n536×18/r/n＝/r/n896÷32/r/n＝/r/n27×706/r/n＝ /r/n780×43/r/n＝/r/n456÷83/r/n＝ /r/n4700÷150/r/n＝/r/n三、填空題/r/n3/r/n．/r/n2021/r/n/r/n年/r/n5/r/n/r/n月/r/n11/r/n/r/n日，第七次中國人口普查結果公布。全國人口/r/n共/r/n1411778724/r/n/r/n人，/r/n線上的數讀/r/n( )/r/n，省/r/n億/r/n”/r/n位后面的尾數（保留整數）約/r/n( /r/n億人。/r/n4/r/n．在括號里填/r/n“/r/n＞/r/n”/r/n或/r/n“/r/n＜/r/n”/r/n。/r/n301780( )1001490 597286402( )597206402/r/n5/r/n．填上合適的面積單位/r/n“/r/n公頃/r/n”/r/n或/r/n“/r/n平方千米/r/n”/r/n。/r/n位于漢口的現代園林解放公園，占地面積/r/n約/r/n46( )/r/n。/r/n位于武昌的東湖風景區是國/r/n家/r/n5A/r/n/r/n級旅游景區，面積約為/r/n88( )/r/n6/r/n．/r/n10000/r/n/r/n平方米＝/r/n( )/r/n公頃；/r/n340/r/n/r/n平方千米/r/n)/r/n公頃。/r/n一個自然數，省略萬位后面的尾數約/r/n是/r/n5/r/n/r/n萬，這個數最大/r/n( )/r/n，最小/r/n/r/n( )/r/n。/r/n○70÷47/r/n，要使商是一位數/r/n里最大/r/n( )/r/n；要使商是兩位數/r/n里最小/r/n/r/n( )/r/n。/r/n明明在計算除法時，把除數/r/n72/r/n/r/n寫成/r/n27/r/n，結果得到的商是/r/n26/r/n，余數是/r/n18/r/n，正確/r/n商是/r/n( )/r/n。/r/n10/r/n．/r/n1000/r/n/r/n張紙的厚度約是/r/n10/r/n/r/n厘米，照這樣算/r/n/r/n億張紙摞起來大約/r/n( )/r/n米。/r/n王叔叔每天早上起床后要聽學習強國/r/n5/r/n/r/n3/r/n/r/n2/r/n/r/n分鐘，吃早餐/r/n10/r/n/r/n分鐘。王叔叔做完這些事情至少要/r/n( )/r/n分鐘。/r/n一個平底鍋每次最多只能煎兩條魚，兩面都要煎，每/r/n面/r/n2/r/n/r/n分鐘。用它煎三條魚/r/n少需要/r/n( /r/n分鐘。/r/n四、作圖題/r/n在下圖中表示出長方形、正方形、平行四邊形和梯形的關系。/r/n以/r/nA/r/n/r/n為端點畫一條射線，然后在這條射線上截取一段/r/n3/r/n/r/n表示。/r/n畫一個平行四邊形和一個梯形，并畫出它們的高。/r/n五、選擇題/r/n16/r/n．/r/n8/r/n/r/n個千萬/r/n/r/n個萬/r/n/r/n個百組成的數是（ /r/n。/r/nA/r/n．/r/n80008800 B/r/n．/r/n80800800 C/r/n．/r/n80088000 D/r/n．/r/n80080800/r/n17/r/n．依據/r/n34×150/r/n＝/r/n5100/r/n，那么/r/n68×/r/n（ ）＝/r/n5100/r/n。/r/nA/r/n．/r/n34 B/r/n．/r/n50 C/r/n．/r/n75 D/r/n．/r/n300/r/n一列火車的速度是/r/n120/r/n/r/n千米/r/n時，一晝夜不停，它能行駛（ ）千米。/r/nA/r/n．/r/n144 B/r/n．/r/n288 C/r/n．/r/n1440 D/r/n．/r/n2880/r/n方方上午/r/n9/r/n：/r/n00/r/n/r/n準時出門，回家時發現時針轉動了/r/n60°/r/n，而分針的位置不變，照/r/n看，她到家的時間是（ /r/n。/r/nA/r/n．/r/n9/r/n：/r/n10 B/r/n．/r/n9/r/n：/r/n50 C/r/n．/r/n10/r/n：/r/n00 /r/n在下圖中，已/r/n那么/r/n∠2/r/n/r/n的度數是（ /r/n。/r/nA/r/n．/r/n36°/r/n六、判斷題/r/n

/r/nB/r/n．/r/n54° C/r/n．/r/n72° D/r/n．/r/n144/r/n最小的自然數是/r/n/r/n0/r/n，沒有最大的自然數． /r/n( )/r/n22/r/n．根據商不變的規律，可以得出/r/n5400÷600/r/n＝/r/n54÷6/r/n＝/r/n9/r/n。/r/n( )/r/n線段可以量出長度，直線和射線都可以無限延伸/r/n( )/r/n兩條平行線之間的距離處處相等/r/n( )/r/n如下圖，聰聰和明明以同樣的速度按如圖的路線向終點跑去，聰聰先到達/r/n/r/n( )/r/n七、解答題/r/n2021/r/n/r/n26/r/n/r/n個中國結來裝飾社區，今年準備的個數比去年的/r/n4/r/n/r/n18/r/n個，今年準備了多少個中國結？/r/n450/r/n元購買羽毛球拍，最多可以買幾支？剩多少錢？/r/n2021/r/n年東京奧運會獎牌榜前四位的獲獎情況。/r/n如果用下圖表示美國、中國、日本和英國四個國家獲得金牌的數量，你打算每/r/n代表（ ）枚。/r/n你能把前四名獲得金牌數量的情況在下圖中表示出來嗎？/r/n5/r/n/r/n345/r/n/r/n2400/r/n米/r/n”/r/n。再過半個小時她能走到長江二橋嗎？/r/n下面是某蛋糕店同一種蛋糕不同規格的售價。王老師要為班上的/r/n40/r/n/r/n一個蛋糕，怎樣買最劃算？王老師最少要花多少錢？/r/n兩數相除商是/r/n5/r/n，余數是/r/n23/r/n。已知被除數、除數、商和余數的總和是/r/n255/r/n求出除數是多少。/r/n5/r/n23”/r/n，請你表示被除數和除數的關系。/r/n依據你的思路，寫出完整的解答過程。/r/nPAGE/r/n13/r/n/r/n13/r/n頁/r/n參考答案：/r/n1/r/n．/r/n2021/r/n；/r/n100/r/n；/r/n1520/r/n；/r/n10/r/n；/r/n10000/r/n17/r/n；/r/n8/r/n；/r/n12000/r/n；/r/n15000/r/n；/r/n8/r/n【解析】/r/n【詳解】略/r/n2/r/n．/r/n9648/r/n；/r/n19062/r/n；/r/n33540/r/n28/r/n；/r/n5……41/r/n；/r/n31……50/r/n【解析】/r/n【分析】/r/n計算三位數乘兩位數時：先用一個乘數的個位與另一個乘數的每一位依次相乘，再用這個乘數的十位與另一個乘數的每一位依次相乘，乘到哪一位，積的個位就與哪一位對齊，哪一位滿幾十就向前一位進/r/n“/r/n幾/r/n”/r/n，再把兩次相乘的積加起來。/r/n除數是兩位數的除法計算：從被除數最高位看起，先用除數試除被除數的前兩位數，如果它比除數小，再試除前三位數。除到被除數的哪一位，就在那一位上面寫商；求出每一位的商，余下的數必須比除數小。/r/n【詳解】/r/n536×18/r/n＝/r/n9648 27×706/r/n＝/r/n19062 780×43/r/n＝/r/n33540/r/n5/r/n3/r/n6/r/n7/r/n0/r/n6/r/n7/r/n8/r/n0/r/n/r/n1/r/n8/r/n/r/n2/r/n7/r/n/r/n4/r/n3/r/n4/r/n2/r/n8/r/n8/r/n4/r/n9/r/n4/r/n2/r/n2/r/n3/r/n4/r/n0/r/n5/r/n3/r/n6/r/n1/r/n4/r/n1/r/n2/r/n3/r/n1/r/n2/r/n9/r/n6/r/n4/r/n8/r/n1/r/n9/r/n0/r/n6/r/n2/r/n3/r/n3/r/n5/r/n4/r/n0/r/n2/r/n8/r/n3/r/n1/r/n8/r/n9/r/n6/r/n5/r/n150 4/r/n7/r/n0/r/n2/r/n8/r/n3/r/n1/r/n8/r/n9/r/n6/r/n5/r/n150 4/r/n7/r/n0/r/n0/r/n6/r/n4/r/n83/r/n4/r/n5/r/n6/r/n4/r/n5/r/n0/r/n2/r/n5/r/n6/r/n4/r/n1/r/n5/r/n2/r/n0/r/n0/r/n2/r/n5/r/n6/r/n4/r/n1/r/n1/r/n5/r/n0/r/n0/r/n5/r/n0/r/n32 /r/n /r/n /r/n /r/n3/r/n． 十四億一千一百七十七萬八千七百二十四 /r/n14/r/n【解析】/r/n【分析】/r/n整數的讀法：從高位到低位，一級一級地讀，每一級末尾的/r/n0/r/n0/r/n都只讀一個零；/r/n省略/r/n“/r/n億/r/n”/r/n后面的尾數就是四舍五入到億位，把億位后的千萬位上的數進行四舍五入，再在數的后面寫上/r/n“/r/n億/r/n”/r/n字；據此解答。/r/n【詳解】/r/n1411778724/r/n讀作：十四億一千一百七十七萬八千七百二十四；/r/n1411778724/r/n人省略億位后面的尾數約是/r/n14/r/n億人。/r/n【點睛】/r/n本題主要考查整數的讀法和求近似數，讀數時要注意零的讀法，求近似數時要注意帶計數單位。/r/n4/r/n． ＜ ＞/r/n【解析】/r/n【分析】/r/n整數大小比較方法：位數不相同的兩個數，位數多的數較大；位數相同的兩個數，從最高位比起，最高位上的數大的那個數較大；如果最高位上的數相同，就比較下一個數位上的數，以此類推。/r/n【詳解】/r/n301780/r/n＜/r/n1001490 597286402/r/n＞/r/n597206402/r/n【點睛】/r/n熟練掌握整數大小的比較方法是解答本題的關鍵。/r/n5/r/n． 公頃 平方千米/r/n【解析】/r/n【分析】/r/n聯系生活實際，結合數據的大小選擇合適的計量單位。/r/n【詳解】/r/n位于漢口的現代園林解放公園，占地面積約/r/n46/r/n公頃。/r/n位于武昌的東湖風景區是國家/r/n5A/r/n88/r/n/r/n平方千米。/r/n【點睛】/r/n根據情景選擇計量單位，本題主要考查學生對生活常識的掌握。/r/n6/r/n． /r/n1 34000/r/n【解析】/r/n【分析】/r/n低級單位平方米化高級單位公頃，除以進率/r/n10000/r/n；/r/n高級單位平方千米化低級單位公頃，乘進率/r/n。/r/n【詳解】/r/n10000÷10000/r/n＝/r/n1/r/n，/r/n10000/r/n平方米＝/r/n1/r/n公頃；/r/n340×100/r/n＝/r/n34000/r/n，/r/n340/r/n平方千米＝/r/n34000/r/n公頃；/r/n【點睛】/r/n本題是考查面積的單位換算，單位換算首先要弄清是由高級單位化低級單位還是由低級單位化高級單位，其次記住單位間的進率。/r/n7/r/n． /r/n54999 45000/r/n【解析】/r/n【分析】/r/n5/r/n/r/n“/r/n”/r/n4/r/n9/r/n54999/r/n；/r/n要求這個數最小是多少，就要考慮是用/r/n“/r/n五入/r/n”/r/n法求得的近似值，也就是千位上是/r/n5/r/n，其它各位上都是/r/n0/r/n，即最小是/r/n45000/r/n。/r/n【詳解】/r/n根據分析可知：一個自然數，省略萬位后面的尾數約是/r/n5/r/n萬，這個數最大是/r/n54999/r/n，最小是/r/n45000/r/n。/r/n【點睛】/r/n此題主要考查了運用/r/n“/r/n四舍五入/r/n”/r/n求一個數的近似數的方法，要熟練掌握。/r/n8/r/n． /r/n3 4/r/n【解析】/r/n【分析】/r/n○70÷47/r/n，要使商是一位數，/r/n○7/r/n＜/r/n47/r/n，那么/r/n○/r/n里可填/r/n1/r/n、/r/n2/r/n、/r/n3/r/n；要使商是兩位數，/r/n○7≥47/r/n，那么/r/n○/r/n里可填/r/n4/r/n、/r/n5/r/n、/r/n6/r/n、/r/n7/r/n、/r/n8/r/n、/r/n9/r/n，據此填空。/r/n【詳解】/r/n由分析可知，/r/n○70÷47/r/n，要使商是一位數，/r/n○/r/n里最大填/r/n3/r/n；要使商是兩位數，/r/n○/r/n里最小填/r/n4/r/n。/r/n【點睛】/r/n三位數除以兩位數，要使商是一位數，百位和十位組成的兩位數要小于除數，要使商是兩位數，百位和十位組成的兩位數大于或等于被除數。/r/n9/r/n．/r/n10/r/n【解析】/r/n【分析】/r/n被除數＝商/r/n×/r/n除數＋余數，據此求出正確的被除數為/r/n26×27/r/n＋/r/n18/r/n。再用正確的被除數除以正確的除數，求出正確的商。/r/n【詳解】/r/n26×27/r/n＋/r/n18/r/n＝/r/n702/r/n＋/r/n18/r/n＝/r/n720720÷72/r/n＝/r/n10/r/n則正確的商是/r/n10/r/n。/r/n【點睛】/r/n熟練掌握算式被除數＝商/r/n×/r/n除數＋余數是解決本題的關鍵。/r/n10/r/n．/r/n10000/r/n【解析】/r/n【分析】/r/n1000/r/n/r/n張紙摞起來的厚度是/r/n10/r/n/r/n厘米，先算厚度/r/n1/r/n/r/n1000÷1/r/n10/r/n（張/r/n1/r/n/r/n1000000/r/n100/r/n1/r/n1000000/r/n1/r/n厘米，據此解答。/r/n【詳解】/r/n1/r/n億＝/r/n100000000/r/n1000÷10/r/n＝/r/n100/r/n（張）/r/n100000000÷100/r/n＝/r/n1000000/r/n（厘米）/r/n1000000/r/n厘米＝/r/n10000/r/n米/r/n【點睛】/r/n求出/r/n1/r/n億里面包含多少個/r/n100/r/n是解答關鍵，注意：長度單位之間的換算。/r/n11/r/n．/r/n15/r/n【解析】/r/n【分析】/r/n聽學習強國的同時刷牙、洗臉，刷牙、洗臉的時間合起來也是/r/n5/r/n分鐘；然后再吃早餐，用/r/n5/r/n＋/r/n10/r/n即可解答。/r/n【詳解】/r/n5/r/n＋/r/n10/r/n＝/r/n15/r/n（分）/r/n王叔叔做完這些事情至少要用/r/n15/r/n分鐘。/r/n【點睛】/r/n當有許多事要做時，科學地安排好先后順序，就能用較少的時間完成較多的事情。/r/n12/r/n．/r/n6/r/n【解析】/r/n【分析】/r/n3/r/n條魚可以這樣煎：為了便于說明問題把三條魚分別編號為/r/n、/r/n、/r/n3/r/n、/r/n2/r/n號，/r/n2/r/n2/r/n3/r/n2/r/n2/r/n3/r/n都熟了；這樣一/r/n2×3/r/n＝/r/n6/r/n分鐘。兩個時間相加即可。/r/n【詳解】/r/n2×3/r/n＝/r/n6/r/n（分）則需要/r/n6/r/n分鐘。/r/n【點睛】/r/n解決此類問題的方法是使效率最大化，即鍋能放滿要盡量放滿，不做無用功。/r/n見詳解/r/n【解析】/r/n【分析】/r/n根據平行四邊形、長方形、梯形和正方形的含義：兩組對邊都平行的四邊形是平行四邊/r/n據此解答即可。/r/n【詳解】/r/n【點睛】/r/n本題考查的是正方形、平行四邊形、梯形和長方形的定義，熟練掌握這些四邊形的定義與性質是解答此題的關鍵。/r/n見詳解/r/n【解析】/r/n【分析】/r/n以/r/nA/r/n為端點向右延長畫一條射線，再截取/r/n3/r/n厘米長的線段即可。/r/n【詳解】/r/n根據分析畫出線段/r/nAB/r/n＝/r/n3/r/n厘米：/r/n【點睛】/r/n本題主要考查了射線和線段的定義。/r/n見詳解/r/n【解析】/r/n【分析】/r/n平行四邊形的兩組對邊平行，梯形只有一組對邊平行。從梯形一條底邊上的一點到它對邊的垂直線段叫做梯形的高。從平行四邊形一條邊上的一點到對邊引一條垂線，這點和垂足之間的線段叫做平行四邊形的高，垂足所在的邊叫做平行四邊形的底。據此畫圖即可。/r/n【詳解】/r/n【點睛】/r/n本題考查平行四邊形和梯形的性質以及高的畫法。平行四邊形和梯形均有無數條高。高一般用虛線表示，并畫上垂足符號。/r/n16/r/n．/r/nD/r/n【解析】/r/n【分析】/r/n根據整數的寫法，從高位到低位，一級一級地寫，哪一個數位上一個單位也沒有，就在那個數位上寫/r/n0/r/n，即可寫出此數；/r/n【詳解】/r/n8/r/n8/r/n8/r/n百萬位、十萬位、千位、十位、個位上都是/r/n0/r/n80080800/r/n。/r/n故答案為：/r/nD/r/n【點睛】/r/n數量掌握整數的數位及計數單位是解答此題的關鍵。/r/n17/r/n．/r/nC/r/n【解析】/r/n【分析】/r/n×/r/n因數＝積，當一個因數乘幾/r/n0/r/n除外/r/n，另一個因數除以幾/r/n0/r/n除外/r/n此解答。/r/n【詳解】/r/n34×150/r/n＝/r/n5100/r/n，當/r/n34×2/r/n＝/r/n68/r/n，那么/r/n150÷2/r/n＝/r/n75/r/n，所以/r/n68×75/r/n＝/r/n5100/r/n。/r/n故答案為：/r/nC/r/n【點睛】/r/n熟練掌握積的變化規律是解答此題的關鍵。/r/n18/r/n．/r/nD/r/n【解析】/r/n【分析】/r/n一晝夜是指/r/n24/r/n小時。用/r/n120×24/r/n求出它行駛的路程。/r/n【詳解】/r/n120×24/r/n＝/r/n2880/r/n（千米）故答案為：/r/nD/r/n【點睛】/r/n熟練掌握路程＝速度/r/n×/r/n時間，是解答此題的關鍵。/r/n19/r/n．/r/nD/r/n【解析】/r/n【分析】/r/n9/r/n：/r/n00/r/n時針在/r/n9/r/n的位置，分針在/r/n12/r/n的位置，鐘面一周為/r/n360°/r/n，共分/r/n12/r/n大格，每格為/r/n30°/r/n，/r/n60°÷30/r/n＝/r/n2/r/n（格/r/n，時針走/r/n1/r/n/r/n大格是/r/n1/r/n/r/n2/r/n/r/n大格就是/r/n2/r/n/r/n小時，即是/r/n2/r/n1/r/n位置不變，據此解答。/r/n【詳解】/r/n方方上午/r/n9/r/n：/r/n00/r/n準時出門，回家時發現時針轉動了/r/n60°/r/n，而分針的位置不變，照此看，她到家的時間是/r/n11/r/n：/r/n00/r/n，所以答案選：/r/nD/r/n。/r/n【點睛】/r/n本題主要考查角度的認識。/r/n20/r/n．/r/nC/r/n【解析】/r/n【分析】/r/n個/r/n∠2/r/n＋/r/n∠1/r/n＝/r/n180°/r/n180°/r/n－/r/n36°/r/n2/r/n個/r/n∠2/r/n2/r/n答。/r/n【詳解】/r/n180°/r/n－/r/n36°/r/n＝/r/n144°/r/n144°÷2/r/n＝/r/n72°/r/n故答案為：/r/nC/r/n【點睛】/r/n熟記平角是/r/n180°/r/n是解答此題的關鍵。/r/n21/r/n．/r/n√/r/n【解析】/r/n略/r/n22/r/n．/r/n√/r/n【解析】/r/n【分析】/r/n商不變的規律：被除數和除數同時乘或除以同一個數/r/n0/r/n除外/r/n，商不變，據此解答。/r/n【詳解】/r/n5400÷100/r/n＝/r/n54/r/n，/r/n600÷100/r/n＝/r/n6/r/n，被除數和除數同時除以/r/n100/r/n，所以商不變。故答案為：/r/n√/r/n【點睛】/r/n熟練掌握商不變的規律是解答此題的關鍵。/r/n23/r/n．/r/n√/r/n【解析】/r/n【分析】/r/n【詳解】/r/n一個端點，所以線段可以量出長度，直線和射線都可以無限延伸，原題干說法正確。/r/n24/r/n．/r/n√/r/n【解析】/r/n【分析】/r/n在同一平面內不相交的兩條直線叫做平行線；連接兩條平行線之間的垂線段是這兩條平行線之間的距離，依此判斷。/r/n【詳解】/r/n兩條平行線間的所有垂線段都相等，因此兩條平行線之間的距離處處相等。/r/n故答案為：/r/n√/r/n【點睛】/r/n熟練掌握平行與垂直的特點是解答此題的關鍵。/r/n25/r/n．/r/n√/r/n【解析】/r/n【分析】/r/n從圖中可知：聰聰跑的是垂直路線，根據連接直線外一點與直線上各點的所有線段中，垂線段最短，可知聰聰先到達。/r/n【詳解】/r/n題說法正確。/r/n√/r/n【點睛】/r/n本題主要考查點到直線的距離：連接直線外一點與直線上各點的所有線段中，垂線段最短，這條垂線段的長度，叫做點到直線的距離。/r/n26/r/n．/r/n122/r/n個/r/n【解析】/r/n【分析】/r/n用去年準備的中國結個數乘/r/n4/r/n，再加上/r/n18/r/n個，得出今年要準備多少個中國結。/r/n【詳解】/r/n26×4/r/n＝/r/n104/r/n（個）/r/n104/r/n＋/r/n18/r/n＝/r/n122/r/n（個）/r/n答：今年準備了/r/n122/r/n個中國結。/r/n【點睛】/r/n本題主要考查整數乘法運算和加法運算知識運用。/r/n27/r/n．/r/n9/r/n支；/r/n1/r/n元/r/n【解析】/r/n【分析】/r/n根據題意，把/r/n2/r/n支羽毛球拍看作一組，用/r/n450/r/n元除以/r/n99/r/n，求出可以買幾組，余下的錢再與/r/n53/r/n元進行比較，看看夠不夠買/r/n1/r/n支羽毛球拍。/r/n【詳解】/r/n450÷99/r/n＝/r/n4/r/n（組）/r/n……54/r/n（元）/r/n54÷53/r/n＝/r/n1/r/n（支）/r/n……1/r/n（元）/r/n4×2/r/n＋/r/n1/r/n＝/r/n8/r/n＋/r/n1/r/n＝/r/n9/r/n（支）/r/n答：最多可以買/r/n9/r/n支，還剩/r/n1/r/n元。/r/n【點睛】/r/n把/r/n2/r/n支羽毛球拍看作一組，找出/r/n450/r/n元里面有幾個/r/n99/r/n元，是解答此題的關鍵。/r/n2/r/n（/r/n）/r/n3/r/n（/r/n2/r/n）見詳解/r/n【解析】/r/n【分析】/r/n根據美國、中國、日本和英國四個國家獲得金牌的數量，以及/r/n統計圖橫軸的小/r/n2/r/n/r/n30/r/n/r/n3/r/n/r/n適。/r/n可。/r/n【詳解】/r/n如果用下圖表示美國、中國、日本和英國四個國家獲得金牌的數量，每格代表/r/n3/r/n/r/n枚。/r/n（/r/n2/r/n）/r/n【點睛】/r/n本題考查了數據分析和整理，能熟練地繪制條形統計圖。/r/n不能/r/n【解析】/r/n【分析】/r/n345÷/r/n69/r/n（/r/n分/r/n30×6/r/n＝/r/n2070/r/n（米/r/n；最后和/r/n2400/r/n進行比較即可。/r/n【詳解】/r/n345÷5/r/n＝/r/n69/r/n（米/r/n//r/n分）/r/n30×69/r/n＝/r/n2070/r/n（米）/r/n2070/r/n＜/r/n2400/r/n答：再過半個小時她不能走到長江二橋。/r/n【點睛】/r/n此題考查了乘法的應用，關鍵是明確：速度＝路程/r/n÷/r/n時間。/r/n2/r/n15/r/n2/r/n4/r/n/r/n2/r/n3/r/n元/r/n【解析】/r/n【分析】/r/n一大盒/r/n15/r/n/r/n30÷1/r/n＝/r/