1、七年级数学上册25 有理数的减法课时作业含答案北师大版2.5 有理数的减法1.比1小3的数是()A4 B2C2 D42若两个数绝对值之差为0,则这两个数()A相等B互为相反数C两数均为0D相等或互为相反数3已知实数m,n在数轴上的对应点的位置如图所示,则下列判断正确的是()Am0 Bn0Cmn0 Dmn04比1 低2 的温度是_.5今年高考第一天,漳州最低气温25 ,最高气温33 ,则这天温差是_.6从1中减去与的和,所列算式为_,所得的差为_7计算|1|_.8若a0,b0,则ab_0.9计算:(1)(5.4)(6)1;(2)()()();(3)(5)(3)(2)(2.5);(4)(7)(1)
2、(7)(21)10某一矿井如图所示,以地面为准,A点的高度是3米,B,C,D三点的高度分别是10米,20米,30米问:(1)最低高度比最高高度低多少米?(2)你试着用折线统计图表示A,B,C,D四点的高度变化情况11用有理数的减法解答下列问题:(1)在数轴上,A,B两点表示的有理数分别为3和4.5,求A,B两点间的距离;(2)某地白天最高气温是20 ,夜间最低气温是零下15 ,该地夜间气温比白天气温最多低多少摄氏度?(3)物体位于地面上空2米处,下降3米后又下降5米,最后物体在地面之下多少米处?(2012山西)计算:25的结果是()A7 B3C3 D7课后作业1A134.2D两个数绝对值之差为
3、0,则这两个数相等或互为相反数3C由条件可知m0,故mn0.435.86.1()7.8.9解:(1)13.3(2)(3)(4)38原式152338.10(1)33米3(30)33(米)(2)11解:(1)8;(2)35;(3)6米中考链接A257英语不规则动词归类记忆表 一、AAA型(原形原形原形)原形过去式过去分词汉语意思readreadread读cutcutcut切,割letletlet让putputput放costcostcost花费,值hithithit撞,击setsetset安排,安置hurthurthurt使伤痛二、ABA型(原形过去式原形)原形过去式过去分词汉语意思becomeb
4、ecamebecome成为comecamecome来runranrun跑三、ABC型1. ow ew own原形过去式过去分词汉语意思blowblewblown吹drawdrewdrawn画growgrewgrown生长knowknewknown 知道flyflewflown飞2. ia u 原形过去式过去分词汉语意思beginbeganbegun开始drinkdrankdrunk喝singsangsung唱swimswamswum游泳ringrangrung打电话3. 原形过去式过去式+(e)n原形过去式过去分词汉语意思wearworeworn穿forgetforgotforgotten忘记
5、speakspokespoken说freezefrozefrozen冻choosechosechosen选择4. 原形过去式原形+(e)n原形过去式过去分词汉语意思eatateeaten吃forbidforbadeforbidden禁止givegavegiven给rideroderidden骑seesawseen看见writewrotewritten写fallfellfallen落下5. 无规律原形过去式过去分词汉语意思am/iswasbeen是arewerebeen是dodiddone做gowentgone走taketooktaken拿四、ABB型1. 原形ought ought原形过去式过
6、去分词汉语意思bringbroughtbrought带来buyboughtbought买fightfoughtfought打架thinkthoughtthought思考2. 原形aught aught原形过去式过去分词汉语意思catchcaughtcaught捉,抓teachtaughttaught教3. 变其中一个元音字母原形过去式过去分词汉语意思feedfedfed喂meetmetmet遇见get gotgot得到holdheldheld拥有sitsatsat坐winwonwon赢findfoundfound发现4. 原形ltlt原形过去式过去分词汉语意思feelfeltfelt感到kee
7、pkeptkept保持leaveleftleft离开sleepsleptslept睡sweepsweptswept扫5. 变其中一个辅音字母原形过去式过去分词汉语意思buildbuiltbuilt建造hearheardheard听见makemademade制造meanmeantmeant意思sendsentsent送,寄spendspentspent花费dealdealtdealt处理6.辅音字母和元音字母都变原形过去式过去分词汉语意思havehadhad有,吃laylainlain放loselostlost丢失paypaidpaid付钱saysaidsaid说sellsoldsold卖tel
8、ltoldtold告诉standstoodstood站五、AAB型原形过去式过去分词汉语意思beatbeatbeaten打败六、有两种形式原形过去式过去分词汉语意思bearboreborn生borebornehanghangedhanged吊死hunghung挂learnlearnedlearned学learntlearntlieliedlied说谎laylain躺showshowedshowed给看showedshownspellspelledspelled拼写speltspeltburnburned burned烧burntburntsmellsmelledsmelled闻smeltsme
9、ltshineshinedshined照耀shoneshonedreamdreameddreamed做梦dreamtdreamtwakewakedwaked醒wokewokenhidehidhid躲藏hidhidden七、情态动词原形过去式过去分词汉语意思cancould能maymight也许must必须shallshould将要willwould会不规则单词测试卷(1)微信添加“小魔方站”或“fifteen1617”免费获得更多中考资料与模拟试题原形过去式过去分词汉语意思动词原形过去式过去分词汉语意思readgivecutrideletseeputwritecostfallhitam/iss
10、etarehurtdobecomegocometakerunbringblowbuydrawfightgrowthinkknowcatchflyteachbeginfeeddrinkmeetsinggetswimholdringbabysitwearsitforgetwinspeakfindfreezefeelchoosekeepeatleaveforbidsleep不规则单词测试卷(2)动词原形过去式过去分词汉语意思动词原形过去式过去分词汉语意思sweephidebuildcanhearmaymakemustmeanshallsendwillspend填空deal1月have2月lay3月l
11、ose4月pay5月say6月sell7月tell8月stand9月beat10月bear11月hang12月learnlie星期一show星期二spell星期三burn星期四smell星期五shine星期六dream星期日wake不规则单词测试卷(3)动词原形过去式过去分词汉语意思动词原形过去式过去分词汉语意思am/iseatarefallbabysitfeedbearfeelbearfightbeatfindbecomeflybeginforbidblowforgetbringfreezebuildgetburngiveburngobuygrowcanhangcatchhangchoose
12、havecomehearcosthidecuthidedealhitdigholddohurtdrawkeepdreamknowdreamlaydrinklearndrivelearn不规则单词测试卷(4)动词原形过去式过去分词汉语意思动词原形过去式过去分词汉语意思leavesitlendsleepletsmellliesmellliespeaklosespellmakespellmayspendmeanstandmeetsweepmustswimpaytakeputteachreadtellridethinkringwakerunwakesaywearseewillsellwinsendwritesetshallshineshineshowshowsing
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