文档介绍：900-807=
784-685=
76 X 5=
63+3=
458+542=
36+3=
8X 19=
78 6=
81 + 9=
66+6=
51 X 6=
78 X 2=
64 2=
64 8=
630 900-807=
784-685=
76 X 5=
63+3=
458+542=
36+3=
8X 19=
78 6=
81 + 9=
66+6=
51 X 6=
78 X 2=
64 2=
64 8=
630 x 3=
52 4=
45+5=
2X 53=
7 97=
285 X 2=
564 X 5=
4X 615=
3X 1142=
88+8=
3 X 234=
1086+231=
567+1238=
2678-567=
470-9=
522+2346=
312 7=
570+1028=
81 + 9=
660-125=
804+127=
780+1234=
7299-2569=
624 6=
156-97=
386+479=
32112=
8X 250=
5212 4=
3 154=
462-123=
2500+300=
125 X 3=
106 X 5=
483 x 3=
823 x 6=
4X 93=
6 765=
5X 2318=
5X 1226=
816+2358=
3 212=
45+3=
567+284=
602-394=
4612=
606-208=
63+7=
1985+303=
123 7=
46 + 4=
46 X 58=
326 X 5=
48 8=
37+7=
784-685=764 X 5=
67 5=
56 4=
458+542=42+ 3=
87 X 9=
497-299=
2008-1279=
472+1028=
1233+232=
2340-123=
4578-2312=
324 X 2=
44+3=
2341+123=
49+6=
63+7=
7020X 8=
334-123=
546+1230=
998 X 9=
188+119=
2000-1098=
8024-1506=
9243+7853=
378 X 7=
5X 307=
7000-3505=
753 X 6=
2345-1123=
438+741=
71 + 8=
38+1279=
233+938=
378+427=
2500+300=
156-97=
386+479=
321 X 2=
5364+132=
3456-789=
234-123=
1123-234=
3451+123=
1234 7=
1232X4=
2134-123=
2010+2311=
234-123=
678+123=
345+123=
1123-234=
234 X 5=
123+213=
23+2=
44+5=
233 X 6=
546-378=
123 x 8=
2345-12