1、2021/2/21算一算找规律框一框读一读2021/2/22 (1)678678795 795 (2)9023(2)90231186 1186 (3)457(3)457142 142 (4)8624(4)86245656复习复习:用计算器计算用计算器计算2021/2/231 1、比一比、比一比,看谁算得又对又快看谁算得又对又快.34357901848292234125384012138312065918273375练习练习:2021/2/242.2.用计算器计算用计算器计算.948647 (3945477)57845025249 6396(520438)2021/2/253.3.用计算器计算，
2、并找一找各组的规律。用计算器计算，并找一找各组的规律。9 9 1 =98 9 2 =987 9 3 =9876 9 4 =808808880888802021/2/269 9 1 =98 9 2 =987 9 3 =9876 9 4 =808808880888802021/2/279 9 1 =98 9 2 =987 9 3 =9876 9 4 =808808880888802021/2/289 9 1 =98 9 2=987 9 3=9876 9 4 =808808880888802021/2/299 9 1 =98 9 2 =987 9 3 =9876 9 4 =98765 9 5 =98
3、7654 9 6 =9876543 9 7 =98765432 9 8 =808808880888808888808888880888888808888888802021/2/21019+99=118+989=1117+9879=11116+98769=111115+987659=1111114+9876549=11111113+98765439=111111112+987654329=10010001000010000010000001000000010000000010000000002021/2/211129-8=1239-7=12349-6=123459-5=1234569-4=123
4、45679-3=123456789-2=1234567899-1=10010001000010000010000001000000010000000010000000002021/2/212（10-1）9=（200-2）9=（3000-3）9=（40000-4）9=（500000-5）9=（6000000-6）9=（70000000-7）9=（800000000-8）9=1223334444555556666667777777888888882021/2/2132021/2/214服务项目服务项目单位单位数量数量单价单价金额金额千千 百百 十十 元元 角角 分分熊猫74cm彩电台12365元红
5、花牌餐具套324元VCD碟片盘525元电脑打印纸盒1236元人民币人民币（大写）（大写）仟仟 佰佰 十十 元元 角角 分分备注备注2 3 6 5 0 0700502072 450000 02342021/2/2152021/2/216 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 3115149161810112122232021/2/217 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
6、27 28 29 30 3114149161810112122232021/2/218 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 3116149161810112122232021/2/219 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 3118149161810112122232021/2/220 1 2 3 4 5 6 7 8 9 10 11 12 13
7、14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 319149161810112122232021/2/221 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 3110149161810112122232021/2/222 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 311114916181011212223202
8、1/2/223 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 3121149161810112122232021/2/224 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 3122149161810112122232021/2/225 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 3123149161810112122232021/2/226
