中文字幕精品无码一区二区,成全视频在线播放观看方法,大伊人青草狠狠久久,亚洲一区影音先锋色资源

遼寧省鞍山市2024-2025學年七年級上學期期末數學試卷(圖片版,含答案)

資源下載
  1. 二一教育資源

遼寧省鞍山市2024-2025學年七年級上學期期末數學試卷(圖片版,含答案)

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)
P
60° 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
A
B.
D
3.如圖,數軸上點A表示的數的相反數是
A.
A

-4-3-2-101234
第3題圖
C.3
D.-3
4.與-3m次數相等的單項式是
A.x2y
B.33m
C.3
8
D.-3ab
5.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=4-2x
0→5x+2x=4-3
②+
-3x=1
A.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=一3
6.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 B
C.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ApP
7.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a
500
250
100
50
運輸的天數t
2
10
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.124
B.67
C.49
D.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=1
2
3
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

<pre id="tfb94"><li id="tfb94"></li></pre>

<bdo id="tfb94"><rt id="tfb94"></rt></bdo>
  • <menu id="tfb94"><dl id="tfb94"></dl></menu><i id="tfb94"><acronym id="tfb94"><sub id="tfb94"></sub></acronym></i>

    1. 主站蜘蛛池模板: 南郑县| 岑溪市| 象州县| 洞口县| 安庆市| 文水县| 达州市| 鲜城| 宝丰县| 高碑店市| 景洪市| 吴旗县| 舒兰市| 苗栗市| 牙克石市| 宁德市| 肥乡县| 赫章县| 惠安县| 高雄县| 牡丹江市| 体育| 阳信县| 藁城市| 淮北市| 会同县| 赤城县| 江源县| 塘沽区| 林甸县| 陆丰市| 湄潭县| 察雅县| 大方县| 汉寿县| 鹰潭市| 玉树县| 博爱县| 息烽县| 双鸭山市| 宝鸡市|