文档介绍：一、计算
4074-4 =
5084-6 =
8644-8 =
3814-6 =
5454-5 =
2054-7 =
5464-3 =
5624-7 =
890^7 =
2644-4 =
7254-5 =
5784-6 =
8644-4 =
4104-8 =
4034-2 =
6324-8 =
8034-4 =
8374-9 =
6754-5 =
2754-5= 506 -
9. 7-4. 8 =
89X46 =
10 - =
35 X24 =
1- =
76X24 =
5 + =
26X37 =
-4. 25 =
63X27 =
+2. 54 =
98X56 =
12 - =
0X56 =
5. 3+4. 9 =
89X46 =
- =
43X25 =
328= 75X40 =
9064-6 =
840^7 =
84X32 =
823 - 287 =
98X23= 5454-5 =
5124-3 =
24X42 =
4964-4 =
500 - 2464-6
125X0X8
二、估算
29X41^
196X38^
2384-4^
36214-9^
153一5~
78X29^
123一4~
63X91^
28X22 ~
31X58^
42X69^
72X28^
18X29^
19X81^
205X39^
22X31^
7224-8 =
1584-4^
5424-6^
3564-6^
419一7~
1194-6^
176一9~
282一4~
124一3~
1814-6^
358一4~
359一6~
2374-6^
398一5~
622一7~
9014-3^
608一3~
459一9~
21X49^
三、递等式计算
814-3X7
(706 - 246) 4-5
568一 (2X4)
25X (8 - 4)
35X0 + 35
63 X (5+0)
568 - 14X12
(78 + 64) 4-2
45X (33 - 16)
8