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[病例呈现]乐乐和豆豆一起到学生用品商店去买东西。货架上标着一些物品的单价:跳绳2.75元,橡皮0.95元,文具盒5.8元,钢笔10.2元。乐乐说:“买一根跳绳需要二点七十五元,橡皮需要九十五元,文具盒需要五点八元,钢笔需要十元二。”●[病因诊断]●我豆豆听了,告诉乐乐说:“这四个数只有五点八元你读对了,其余的你读得都不对。”“为什么呢?”乐乐不明白。豆豆说:“你出现上述‘病症’的原因是没有掌握读小数的方
[Case Presentation] Lele and Peas go to the student shop to buy things. Shelf marked with the price of some items: skipping 2.75 yuan, eraser 0.95 yuan, stationery box 5.8 yuan, pen 10.2 yuan. Lele said: ”Buy a skipping rope needs two seventy-five yuan, eraser needs ninety-five yuan, stationery box needs five eight yuan, fountain pen needs ten yuan two. “ Listened to tell Lele, said: ”The four numbers only $ 5.80 you read right, you read the rest are not right. “ ”Why?“ Lele do not understand. Peas said: ”Your reason for the above symptoms is that you do not have any knowledge of the decimal places