乘法和加、减法的两步混合运算

单击此处编辑母版标题样式,编辑母版文本样式,第二级,第三级,第四级,第五级,2019/4/27 Saturday,#,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,2019/4/27 Saturday,#,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,#,不含括号的两步计算,复习,3-2+8=,23,6=,9-3-2=,21,9,4,36,5+7+8=,观察图片有哪些数学信息,=一共用去多少元,3本笔记本价钱,1个书包的价钱,你会列式并计算吗？,+,53=15,（,元,）,15+20=35,（,元,）,分步算式,（先算,3,本笔记本的价钱,）,（再算,3,本笔记本的价钱加上,1,个书包的价钱）,53+20,=,15,+20,=,35,（元）,递等式,综合算式,尝试列出综合算式，并用递等式计算,付出,的,50,元,买2盒水彩笔的钱,=,找回,多少元,（,2,）,小,晴买2盒水彩笔，付出50元，应找回多少元？,50-152,=,50,30,=,20,（元）,-,50-152,=,50,30,=,20,-,53+20,=,15,+20,=,35,仔细观察这两道综合算式，计算过程中有什么相同之处？,小结：算式中有乘法和加、减法时，应先算,乘法,，再算加法或减法。,练习与巩固,96,9,87,38,60,98,80,69,11,50+350,400,40-28,-25,5,.,答：应付,68,元。,（,1,）买,4,张成人票和,1,张儿童,票，应付多少元？,=60,=68（元）,+8,154+8,本节课你有哪些收获？,4,.,32+320,32+3-20,比一比，算一算。,56-78,56,78,173+20,=32+60,=92,=35-20,=15,=56-56,=0,=8 8,=64,=51+20,=71,=17+60,=77,17+320,PPT,模板下载：, 赏,5,.,答：应找回,4,元。,（,2,）用,100,元买,12,张儿童票，,应找回多少元？,100-,812,=100-,=4（元）,96,98,80,69,11,87,38,60,96,9,口答,1.在计算36-6,4,时先算（）法，再算（）法。,2.计算48-5,8,时，先算（,），再算（），结果是（）。,58,乘,减,48-40,8,复习,36+8=,56-9=,3,6=,18+8=,56=,30-9=,18,26,26,30,21,21,53=15,（,元,）,15+20=35,（,元,）,分步算式,（先算3本笔记本的价钱,）,（再算3本笔记本的价钱加上1个书包的价钱）,53+20,=,15,+20,=,35,（元）,递等式,综合算式,CONTENTS,Part 01,Praesent sodales odio sit amet odio tristi Praesent sodales odio sit,Part 02,Praesent sodales odio sit amet odio tristi Praesent sodales odio sit,Part 03,Praesent sodales odio sit amet odio tristi Praesent sodales odio sit,Part 04,Praesent sodales odio sit amet odio tristi Praesent sodales odio sit,4,.,32+320,32+3-20,比一比，算一算。,56-78,56,78,173+20,17+320,=32+60,=92,=35-20,=15,=56-56,=0,=8 8,=64,=51+20,=71,=17+60,=77,96,9,87,38,60,98,80,69,11,96,9,87,38,60,96,9,你能根据题目的条件和问题补充数量关系式吗？,=一共用去多少元,3本笔记本价钱,1个书包的价钱,你会列式并计算吗？,+,尝试列出综合算式，并用递等式计算,你能根据题目的条件和问题补充数量关系式吗？,付出的50元,买2盒水彩笔的钱,=,找回多少元,I love you more than Ive ever loved any woman.And Ive waited longer for you than Ive waited for any woman.I love you more than Ive ever loved any woman.And Ive waited longer for you than Ive waited for any woman.,I love you more than Ive ever loved any woman.And Ive waited longer for you than Ive waited for any woman.I love you more than Ive ever loved any woman.And Ive waited longer for you than Ive waited for any woman.I love you more than Ive ever loved any woman.,添加标题,53=15,（,元,）,15+20=35,（,元,）,分步算式,（先算,3,本笔记本的价钱,）,（再算,3,本笔记本的价钱加上,1,个书包的价钱）,53+20,=,15,+20,=,35,（元）,两道算式列在一起的的综合算式你会计算吗？计算顺序是什么？,一,共用去多少,元,=,3本笔记本价钱+,1个书包的价钱,递等式,注意：,1.,等号在下一行算式的左端，每一步等号要对齐,2.,没有计算的部分要照抄下来,综合算式,（2）小晴买2盒水彩笔，付出50元，应找回多少元？,50-152,=,50,30,=,20,（元）,-,（,先算出买两盒水彩笔需要多少钱，再用付出的50元去掉两盒水彩笔的钱）,text,1200,text,998,text,1120,text,1445,text,832,I love you more than Ive ever loved any woman.And Ive waited longer for you than Ive waited for any woman.I love you more than Ive ever loved any woman.And Ive waited longer for you than Ive waited for any woman.,添加标题,I love you more than Ive ever loved any woman.And Ive waited longer for you than Ive waited for any woman.I love you more than Ive ever loved any woman.And Ive waited longer for you than Ive waited for any woman.,添加标题,添加标题,I love you more than Ive ever loved any woman.And Ive waited longer for you than Ive waited for any woman.,添加标题,I love you more than Ive ever loved any woman.And Ive waited longer for you than Ive waited for any woman.,添加标题,I love you more than Ive ever loved any woman.And Ive waited longer for you than Ive waited for any woman.,添加标题,I love you more than Ive ever loved any woman.And Ive waited longer for you than Ive waited for any woman.,添加标题,I love you more than Ive ever loved any woman.And Ive waited longer for you than Ive waited for any woman.,添加标题,I love you more than Ive ever loved any woman.And Ive waited longer for you than Ive waited for any woman.,PART.02,添加标题,I love you more than Ive ever loved any woman.And Ive waited longer for you than Ive waited for any woman.,添加标题,I love you more than Ive ever loved any woman.And Ive waited longer for you than Ive waited for any woman.,添加标题,I love you more than Ive ever loved any woman.And Ive waited longer for you than Ive waited for any woman.I love you more than Ive ever loved any woman.And Ive waited longer for you than Ive waited for any woman.,82,%,60,%,18,%,I love you more than Ive ever loved any woman.And Ive waited longer for you than Ive waited for any woman.I love you more than Ive ever loved any woman.,添加标题,I love you more than Ive ever loved any woman.And Ive waited longer for you than Ive waited for any woman.I love you more than Ive ever loved any woman.,添加标题,I love you more than Ive ever loved any woman.And Ive waited longer for you than Ive waited for any woman.I love you more than Ive ever loved any woman.,添加标题,I love you more than Ive ever loved any woman.And Ive waited longer for you than Ive waited for any woman.I love you more than Ive ever loved any woman.And Ive waited longer for you than Ive waited for any woman.,添加标题,I love you more than Ive ever loved any woman.And Ive waited longer for you than Ive waited for any woman.I love you more than Ive ever loved any woman.A