题干

食堂买来280千克菜,计划吃7天,实际平均每天比计划少吃5千克,这批菜实际吃了多少天?
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解:280÷(280÷7-5)=8(天)

同类题3

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    Many kids help out around the house with chores(家庭杂务) such as emptying the dishwasher, putting laundry away, and taking out the trash. In exchange, some kids get allowances(补贴) or other rewards such as extra computer time.

    But some people do not think that kids should get rewards for doing chores. Susie Walton, a parenting educator and family coach, believes that by rewarding kids, parents are sending a message that work isn't worth doing unless you get something in return. "Running any kind of household is a team effort," Susie said. "A home is a living space for everyone in the family. It's important for kids to see that we all have responsibilities in the house, and that families decide together how they want their home to look, and how they are going to keep it looking like everyone wants it to look."

    Other people believe that getting a cash allowance or other rewards motivates kids to do chores, and it also teaches them real world lessons about how we need to work to earn money. There are also new applications that give kids points and digital gifts that can be redeemed(兑取) either online or in the real world. With the ChoreMonster app, kids earn digital points by completing chores that they can turn in for real-life rewards such as extra Xbox time or a trip to the mall. "Our goal is to encourage kids to earn rewards," says Chris Bergman, founder of ChoreMonster. "Kids need positive reinforcement(强化) to help motivate them."

    What do you think? Should kids be rewarded for doing chores? Or should kids help out around their homes without getting anything in return?

    Write a 200-word response. Send it to tfkasks4youtimeforkids.com. Your response may be published in a future issue of Time For Kids. Please include your grade and contact information of your parent or teacher if you want your response to be published. The deadline for responding is February 18.

同类题5

阅读下面的议论文,回答问题

不经风雨,怎见彩虹(考场作文)

    ①孟鸿寿,自幼患了软骨病,身长腿短,投特别大,脚小而纤细,走起路来很艰难。但他下定决心苦学三年,终于成为独树一帜的名丑。是挫折与艰辛使他功垂名就。

    ②电灯的发明,是发明大师爱迪生经历了上千次失败才发明成功的。上千次失败充满了他对广明的渴望,也促使他将失败转化为动力,从而将光明带给人类。

    ③袁隆平,当他还是一名乡村教师的时候,便对权威发起了挑战,他不再迷信权威,他要为广大的农民兄弟干出自己的一番伟业。凭着自己的一腔热情,他成为了“杂交水稻之父”,成为了救饥救贫的人间天使。

    ④我不能说挫折就是走向成功的唯一条件,但我要说,如果没有挫折作为动力,没有经历风雨的洗礼,要想取得成功恐怕是不可能的。

    ⑤江淹才思敏捷,妙笔生花,但终究还是“江朗才尽”;方仲永智慧过人,五岁就能“指物作诗立就”,但最终却“泯然众人矣”。

    ⑥绚丽的彩虹,成功的果实,决不会青睐那些整日碌碌无为的人。

    ⑦如果没有居里夫人夜以继日的研究就没有镭的发现;如果没有阿炳的苦心拉奏,就没有那如泣如诉,哀婉动人的《二泉映月》;如果没有我国航天科技工作者的潜心研究,就没有“神七”、“神八”的升天、祖国的辉煌。我们要以勤劳为色彩,绘出我们人生美丽的彩虹。经历了风雨,也许我们才会抛弃高不可攀的幻想,才会忘记那不堪回首的沧桑,才会走出落花有意、流水无情的迷茫。经历了风雨,我们才能拥有①的超然;经历风雨,我们才能拥有②的自信;经历风雨,我们才能拥有③的傲骨;经历风雨,我们才能拥有④的洒脱。

    ⑧这些都使我们明白了“不经历风雨,怎见彩虹”的真理。

    ⑨不经风雨,怎见彩虹?