数学四年级上西师大版1用计算器计算课件（26张）
文档属性
| 名称 | 数学四年级上西师大版1用计算器计算课件（26张） |  | |
| 格式 | zip | ||
| 文件大小 | 172.7KB | ||
| 资源类型 | 教案 | ||
| 版本资源 | 西师大版 | ||
| 科目 | 数学 | ||
| 更新时间 | 2015-10-26 18:48:27 | ||
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文档简介
课件26张PPT。用计算器计算练习算一算找规律框一框读一读 (1) 678＋795
(2) 9023－1186
(3) 457×142
(4) 8624÷56复习:用计算器计算复习:用计算器计算1、比一比,看谁算得又对又快.34×357－9018÷48－2922÷34×125384012138312065918273375练习:练习1比一比看谁算得又快又对2. 用计算器计算.94×86÷47 (394＋5477)÷57
8450÷25－249 6396÷(520－438)练习2用计算器计算3.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 =80880888088880练习3计算并找规律9 × 9 — 1 =98 × 9 — 2 =987 × 9 — 3 =9876 × 9 — 4 =80880888088880练习3计算并找规律9 × 9 — 1 =98 × 9 — 2 =987 × 9 — 3 =9876 × 9 — 4 =808808880888809 × 9 — 1 =98 × 9 — 2 =987 × 9 — 3 =9876 × 9 — 4 =808808880888809 × 9 — 1 =98 × 9 — 2 =987 × 9 — 3 =9876 × 9 — 4 =98765 × 9 — 5 =987654 × 9 — 6 =9876543 × 9 — 7 =98765432 × 9 — 8 =80880888088880888880888888088888880888888880总结19 + 9×9 =118 + 98×9 =1117 + 987×9 =11116 + 9876×9 =111115 + 98765×9 =1111114 + 987654×9 =11111113 + 9876543×9 =111111112 + 98765432×9 =1001000100001000001000000100000001000000001000000000进一步计算找规律112×9- 8 =123×9- 7=1234×9- 6=12345×9- 5=123456×9- 4=1234567×9- 3=12345678×9- 2=123456789×9- 1=1001000100001000001000000100000001000000001000000000进一步计算找规律2（10-1）÷ 9=（200-2）÷ 9=（3000-3）÷ 9=（40000-4）÷ 9=（500000-5）÷ 9=（6000000-6）÷ 9=（70000000-7）÷ 9=（800000000-8）÷ 9=122333444455555666666777777788888888进一步计算找规律3应用题1应用题1分析应用题2 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 311514916181011212223应用题2分析 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 311414916181011212223应用题2分析 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 311614916181011212223应用题2分析 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 311814916181011212223应用题2分析 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 31914916181011212223应用题2分析 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 311014916181011212223应用题2分析 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 311114916181011212223应用题2分析 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 312114916181011212223应用题2分析 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 312214916181011212223应用题2分析 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 312314916181011212223应用题2分析扩展资料
(2) 9023－1186
(3) 457×142
(4) 8624÷56复习:用计算器计算复习:用计算器计算1、比一比,看谁算得又对又快.34×357－9018÷48－2922÷34×125384012138312065918273375练习:练习1比一比看谁算得又快又对2. 用计算器计算.94×86÷47 (394＋5477)÷57
8450÷25－249 6396÷(520－438)练习2用计算器计算3.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 =80880888088880练习3计算并找规律9 × 9 — 1 =98 × 9 — 2 =987 × 9 — 3 =9876 × 9 — 4 =80880888088880练习3计算并找规律9 × 9 — 1 =98 × 9 — 2 =987 × 9 — 3 =9876 × 9 — 4 =808808880888809 × 9 — 1 =98 × 9 — 2 =987 × 9 — 3 =9876 × 9 — 4 =808808880888809 × 9 — 1 =98 × 9 — 2 =987 × 9 — 3 =9876 × 9 — 4 =98765 × 9 — 5 =987654 × 9 — 6 =9876543 × 9 — 7 =98765432 × 9 — 8 =80880888088880888880888888088888880888888880总结19 + 9×9 =118 + 98×9 =1117 + 987×9 =11116 + 9876×9 =111115 + 98765×9 =1111114 + 987654×9 =11111113 + 9876543×9 =111111112 + 98765432×9 =1001000100001000001000000100000001000000001000000000进一步计算找规律112×9- 8 =123×9- 7=1234×9- 6=12345×9- 5=123456×9- 4=1234567×9- 3=12345678×9- 2=123456789×9- 1=1001000100001000001000000100000001000000001000000000进一步计算找规律2（10-1）÷ 9=（200-2）÷ 9=（3000-3）÷ 9=（40000-4）÷ 9=（500000-5）÷ 9=（6000000-6）÷ 9=（70000000-7）÷ 9=（800000000-8）÷ 9=122333444455555666666777777788888888进一步计算找规律3应用题1应用题1分析应用题2 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 311514916181011212223应用题2分析 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 311414916181011212223应用题2分析 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 311614916181011212223应用题2分析 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 311814916181011212223应用题2分析 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 31914916181011212223应用题2分析 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 311014916181011212223应用题2分析 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 311114916181011212223应用题2分析 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 312114916181011212223应用题2分析 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 312214916181011212223应用题2分析 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 312314916181011212223应用题2分析扩展资料