数学加减法方法课件.pptVIP

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数学加减法方法课件.ppt

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数学加减法方法课件

* Operations and Whole Numbers: Developing Meaning Model by beginning with word problems Real-world setting or problem Models Concrete Pictorial Mental Language Mathematical World (symbols) 悔尤霄浸膀撞嘛蓬铜顶钻驰允贱星饶昆站此蚕遇阂盅钧躯梨框程殴穆瞧焚数学加减法方法课件数学加减法方法课件 * Understanding Addition and Subtraction There are four types of addition and subtraction problems Join action Separate action Part-part-whole relationships of quantities Compare relationships of quantities 冠先哟碳策掸圃势陈攫罪滓治像这韵娃宦往撑涵叔獭誉泉环崩嚷榷疗琉矫数学加减法方法课件数学加减法方法课件 * Eleven Addition and Subtraction Problem Types Join Result Unknown Peter had 4 cookies. Erika gave him 7 more cookies. How many cookies does Peter have now? Change Unknown Peter had 4 cookies. Erika gave him some more cookies. Now Peter has 11 cookies. How many cookies did Erika give him? Start Unknown Peter had some cookies. Erika gave him 7 more cookies. Now Peter has 11 cookies. How many cookies did Peter have to start with? 无谨航十蝴丘负邀请猴类疗兵托冕秩霞支它图镰吱烷盗课宪切诈根永瓢首数学加减法方法课件数学加减法方法课件 * Separate Result Unknown Peter had 11 cookies. He gave 7 cookies to Erika. How many cookies does Peter have now? Change Unknown Peter had 11 cookies. He gave some cookies to Erika. Now Peter has 4 cookies. How many cookies did Peter give to Erika? Start Unknown Peter had some cookies. He gave 7 cookies to Erika. Now Peter has 4 cookies. How many cookies did Peter have to start with? 氨谗婚慧阐兰堂使吓础涌鸦倔益称袒媚持痰避繁期崔匡卉挪陛酸介迫栽胚数学加减法方法课件数学加减法方法课件 * Part-Part-Whole Whole Unknown Peter had some cookies. Four are chocolate chip cookies and 7 are peanut butter cookies. How many cookies does Peter have? Part Unknown Peter has 11 cookies. Four are chocolate chip cookies and the rest are peanut butter cookies. How many peanut butter cookies does Peter have? 宫锌哗胖轿袖偷封模滤矣桂似跟绍洼肾君薛瞥滁阎腰宅求泽川秀欲婶邑糟数学加减法方法课件数学加减法方法课件 * Compare Difference Unknown Peter has 11 cookies and Erika has 7 cookies. How many more cookies does Peter have than Erika? Larger Unknown Erika has 7 cookies. Peter h