資源簡介 2024—2025 學年度第一學期期末質量檢測七年級數學參考答案及評分標準一、 選擇題:(每題 3分,共 24分)題號 1 2 3 4 5 6 7 8答案 B D C A C D C B二、填空題:(每題 3分,共 15分)9. 兩點確定一條直線(或經過兩點有一條直線,并且只有一條直線)10. a 與 b 的和的平方的 2 倍 (答案不唯一,表述準確即可)11. 104°26′15″ 12. 13. 608三、解答題:(本題共 8小題,共 61分)14. (每題 5 分,共 10 分)解:(1)原式= ····································································· (2 分)= (或 ) ······································································ (5 分)(2)原式= ( ) ··················································· (2 分)=-4 ················································································ (5 分)15. (本題 5 分)解: ·································································· (2 分)·························································································· (5 分)16. (本題 6 分)解:(1)陰影部分的周長是:2(x+x+0.5x)+(y+y+3y+3y) ······························ (2 分)=5x+8y ······················································· (4 分)當 x=24,y=15 時,原式=240 ······················································ (6 分)17. (本題 7 分)解: (1)如圖,點 P 即為所求 ································································· (1 分)作出圖形 ··········································································· (5 分)(2)∠APB=30° ······································································· (7 分)P60° 30°A B{#{QQABYYCEogCoAAJAABgCAw2iCgIQkhEAASgGhEAEoAAAyBFABCA=}#}18. (本題 7 分)解: (1) ············································ (2 分)(2) ················································· (4 分)(3) ············································ (7 分)19. (本題 8 分)A B解: C–4 –3 –2 –1 0 1 2 3 4 5 6 7(1)如上圖 ······················································································ (3 分)(2)①PC=0.5t,PA=10-0.5t ··································································· (5 分)②設點 Q 出發 x 秒與點 P 相遇∴ 由題意,0.5x+x=8 ····································································· (6 分)解得 ················································································· (7 分)∴設點 Q 出發 秒后與點 P 相遇 ························································· (8 分)20. (本題 8 分)解:(1)原式= ·········································································· (3 分)(2)成立 ·························································································· (4 分)(a+bi)+ (c+di)= (c+di) +(a+bi) ············································ (5 分)證明:左邊=a+bi+c+di=(a+c)+(b+d)i右邊= c+di+a+bi= c+a+bi+di=(a+c)+(b+d)i∴左邊=右邊 ············································································· (7 分)即(a+bi)+ (c+di)= (c+di) +(a+bi) ···································· (8 分)21. (本題 10 分)解:(1)由表可知,第一階梯水費:13×(2.5+0.6)=40.3(元)第二階梯一共水費:40.3+(16-13)×(3.75+0.6)=53.35(元)∵85.75>53.35∴小明家 1 月份水費達到第三階梯 ··················································· (2 分)3設小明家 1 月份用水量為 x m ,根據題意(7.5+0.6)(x-16)+53.35=85.75 ············································ (4 分)解得 x=20 ··········································································· (5 分)∴小明家 1 月份用水量為 320m ························································ (6 分)(2)①若小明家 2 月,3 月水費均在第一階梯,則設小明家 3 月用水量為 3x m根據題意,得(2.5+0.6)(x+x+4)=75.65解得 x≈10.2此時,2 月用水量 10.2+4>13,不合題意 ······································ (8 分)②若小明家 2 月,3 月水費分別在第二,第一階梯,設小明家 月用水量為 33 x m根據題意,得(2.5+0.6)x+(3.75+0.6)(x+4-13)+40.3=75.65解得 x=10此時,2 月用水量 310+4=14(m )∴小明家 月 月用水量分別為 3, 32 ,3 14m 10m . ······························· (10 分){#{QQABYYCEogCoAAJAABgCAw2iCgIQkhEAASgGhEAEoAAAyBFABCA=}#}2024一2025學年度第一學期期末質量檢測七年級數學試卷(本試卷共21道題試卷滿分為100分考試時間90分鐘)考生注意:請在答題卡各題目規定答題區域內作答,答在本試卷上無效一、選擇題(本題共8小題,每小題3分,共24分,每小題都有四個選項,只有一個最佳選項符合題目要求.)1,中國空間站位于距離地面約400m的太空環境中.由于沒有大氣層保護,在太陽光線直射下,空間站表面溫度可高于零上150℃,其背陽面溫度可低于零下100℃.若零上150℃記作+150℃,則零下100℃記作A.+100℃B.-100℃C.+50℃D.-50℃2.如圖,從前面看紙杯,得到的平面圖形是AB.D3.如圖,數軸上點A表示的數的相反數是A.A月-4-3-2-101234第3題圖C.3D.-34.與-3m次數相等的單項式是A.x2yB.33mC.38D.-3ab5.如圖所示的框圖表示解方程3一5x=4一2x的流程,下列判斷的語句正確的是3-5x=4-2x0→5x+2x=4-3②+-3x=1A.第①步變形的名稱為合并同類項B.第②步變形的依據是等式性質一C.第③步變形的依據是等式性質二D.方程的解為=一36.如圖,點C,D在線段AB上,且AC=CB,CD=DB,下列結論正確的是A.點D是線段AB的中點B.點C是線段AD的中點C D BC.點D是線段AB的三等分點第6題圖D.點C是線段AD的三等分點七年級數學第1頁(共4頁)CS掃描全能王3億人都在用的掃描ApP7.某公司計劃運輸一批貨物,每天運輸的噸數a與運輸的天數t之間的關系如下表:每天運輸的噸數a50025010050運輸的天數t210下列結論:①這批貨物共有500噸;②用式子表示a與t的關系是at-500;③每天運輸的噸數與運輸的時間是反比例關系;④如果該公司計劃4天運完貨物,則每天需要運輸貨物120噸;其中正確結論的個數是個最A.1個B.2個C.3個D.4個8.我國古代《易經》一書中記載,遠古時期,人們通過在繩子上打結來光線記錄數據,即“結繩記數”.如圖,一位母親在從右到左依次排列的零上繩子上打結,滿七進一,用來記錄孩子出生后的天數,由圖可知,孩子出生后的天數是第8題圖A.124B.67C.49D.25二、填空題(本題共5小題,每小題3分,共15分.)9.建筑工人砌墻時,會在兩個墻角的位置分別插一根木樁,然后拉一條直的參照線,這樣做的理由是10.代數式2(a+b)2的意義是11.已知∠=75°33'45”,則∠a的補角的度數是12.明代數學家程大位在《算法統宗》中記載了“百羊問題”,題目大意是:甲趕了一群羊去尋找青草茂盛的地方,乙牽了一只羊緊跟在甲的后面.乙問甲:“你這群羊有一百只嗎?”甲說:“如果我再有這樣一群羊,再加這群羊的一半,再加一半的一半,連同你的這只羊剛好一百只.”如果設甲有羊x只,根據題意可列出方程為13,觀察下列球的排列規律(其中●是實心球,O是空心球):●OO●●0OO0O●OO●●ooooO●OO●●O0O0O●…從第1個球起到第2024個球止,共有實心球的個數為三、解答題(本題共8小題,共61分,解答應寫出文字說明、演算步驟或推理過程)14.(每題5分,共10分)計算:(1)24-(-)+(-3.1)+(2)(-5)2-[(-22-3-23)÷引15.(本題5分)解方程:x+1--1=123七年級數學第2頁(共4頁)CS掃描全能王3億人都在用的掃描Ap0 展開更多...... 收起↑ 資源列表 2024-2025七年上數學期末考試試卷2025-01.pdf (七年)(數學)2024-2025學年度第一學期期末考試答案.pdf 縮略圖、資源來源于二一教育資源庫