文档介绍：26+9=
57-38 =
1500- 700 =
42X 2 =
9决 3=770+ 7=
660+3 =
960+ 3=
180 9 =
65+ 15 =
660 6=800X 2 =
50+ 5=
3X 800 =
21X 2 =
44X 20 =
12X4=
22X 30 =
22X4=
30X 80 =
33X 10 =
50X 90 =
12X40 =
220X 3 =
22X 40 =
90X 40 =
200X3 =
41X20 =
21 X 30 =
10X46 =
3X 700 =
33X 30 =
20X 41 =
6X 600=
24X 20 =
50X 30 =
0X45 =
50X 70 =
800X 7 =
604- 6=
10X 89 =
69X 10 =
13X 30 =
23X 30 =
4X90 =
60X 60 =
60X40 =
90X 30 =
21X40 =
30X 20 =
40X 90 =
2< 31 =
33X 20 =
40X 70 =
48+ 19 =
70X 6 =
4X 900 =
2X310 =
20+35 =
45+ 35 =
32X 20 =
70X 60 =
84X 1 =
900X 6 =
34X 20 =
33X 30 =
31X20 =
700X6 =
84X10 =
9X 800 =
70 X 30 =
2X42 =
86- 47 =
5X90 =
22X 30 =
6X 500 =
8X 70 =
42X 20 =
400+ 300 =
5X 900 =
10X 33 =
22X 0 =
80 X 70 =
200X4 =
0+ 20 =
6X60 =
22X 40 =
4什 20 =
40X40 =
43X 20 =
46+ 37 =
420+ 6=
300+ 6=
40X 11 =
360+9 =
10X34 =
40X 90 =
90X 60 =
490+ 7 =
20X 34 =
300 X 3 =
80X 4 =
65X0 =
330 3 =
25g 5=
680— 80 =
21X40 =
80X40 =
10X 37 =
20X 50 =
2000+ 300 =
880 2 =
70X 20 =
400+ 4=
0X 66 =
50X 30 =
64g 8 =
88g 4=
400+300 =
34+ 39 =
36g 6=99X 10=12X20 =
30X 80 =
41 X 20 =
97X 10 =
700+ 7=
33X 30 =
g 59 =
11X 80 =
200+4 =
31X20 =
60叶 90 =
4700- 700
=44- 37 =
40X 12 =
84-47 =
630+ 7 =
71- 23 =
O 43 =
31X 30 =
21X 30 =
43X 2 =
0X20 =
75+ 18 =
23+ 48 =
90X 30=30X 1