文档介绍:
107X2=
72-47=
20X5=
27 + 15=
2104-2=
6394-3=
27X5=
5104-3=
407X9=
231X30=
824宁牡
1594-3=
123X4=
513X9=
4X815=
994-9=
754-5=
2054-5=
46X8=
24X20=
872-12牡
27 + 127=
7004-5=
350+70=
5914-3=
8X122=
1784-2=
30X80=
816 4-8=
265 + 85=
110X 35=
9014-3=
245 4- 5=
3000 - 300=
605 4- 5=
50 X 50=
306*3=
4804-3=
120X80=
27X8=
62X15=
8604-4=
19X5=
40X20=
520-430=
51X17=
15X61=
874-3=
91X31=
804-10=
4654-5=
8704-8=
400X20=
2104-7=
45004-9=
5X80=
300X30=
88+112=
3804-7=
36X8=
86X7=
27X90=
334-3=
8804-8=
4804-8=
22X22=
16X50=
19X39=
2704-30=
92X7=
38X60=
14 X牡
51-4x64-3 =
3000-6x408=
500-4124-4=
(400-394)x706=
702-199=
140X3=
160X6=
601X6=
414-112=
730—190=
3700-370=
8500-5500=
3200+5100=
96-42=
1200-400=
830-300=
1800+920=
564-7-3=
494-9+7=
14x34-2=
64-3x7=
16-5-4x8=
2x84-4=
424-7x6=
84-4x3=
8-5-4+48=