商店里的数学
岁末年初,许多大型商场都在打折。“购物迷”——妈妈当然不会错过良机。这不,她今天带我去新世界购物。一走进新世界,琳琅满目的商品晃入眼帘。但最抢眼的还是一个个大减价的广告标语,妈妈带着我走进一家女装柜台。妈妈开始挑选衣服,而我在一边闲逛。突然,我看见一个标牌上写着“off60﹪”,我好奇地问妈妈:“妈妈,60﹪是什么意思?”妈妈边挑衣服边对我说:“﹪就是百分比,1是100﹪,那60﹪就是0.6。一个整数乘以﹪,结果会比那个整数小。那个标牌的意思是把原来不打折的价格乘以﹪,得到一个新价格。新价格比原价格低,这就得到优惠了!”“哦!”我若有所思。我们继续逛商场,走进“贝拉维拉”品牌店。这里标牌上写着“5折”,我不懂了,“5折”什么意思?我问妈妈:“‘5折’表示什么?”“钰儿,你应该学会融会贯通!5折就是在原来的价格上减去50﹪……”说到百分比,我就明白了!妈妈让我算一下现在的价格,我在自己手上打乘法草稿,半天才算出来。妈妈笑嘻嘻地对我说:“钰儿,其实乘0.5就是除以2。这样就可以很快地就能算出结果!”今天,我真是受益非浅。不但在物质上得到满足(买到衣服),而且在知识上得到提升,知道百分比,学会百分比!
ou agree or disagree with the following statement? Many schools require young children (aged 5-11) to work together in a small group instead of working alone to learn man activities.
Educators and researchers have never stopped the examination of the importance and relevance of collaborative learning that are encouraged by middle schools. When compared with studying alone, I, personally, believe that it is far more beneficial to students when working in groups for the following reason