文档介绍：25x2 =
45x9 =
11+22 =
115-24 =
25x4 =
35x2 =
125 - 26 =
564 - 12 =
25x6 =
35x4 =
456 + 45 =
45x10 =
25x8 =
- 500=
800x4=
180-3=
18-3=
3600 - 600=
2x9+3=
200x8=
3400 - 300=
30x2=
3x4 + 5=
530 - 70=
120 + 400=
52x7=
2x7 + 8=
850x2=
21-7=
100x4=
2x8 + 6=
263 - 80=
700 + 800=
400x8 =
2x9 + 5=
850-2=
9x4=
900x5 =
90x9=
98 + 26x0=
48-6=
40x6 =
8x ( ) <65
6x3=
1200 + 800=
10x9 =
( )x9<38
49-7=
720 + 80=
3x8 =
6x ( ) <49
18-6=
8x7=
18 + 53 =
( )x9<20
45 + 32=
460 + 400=
3x7+4=
7x ( ) <50
24-8=
6x8=
4x6 + 2=
5x( ) <32
40-5=
6x7=
5x9 + 6=
500 + 300=
45-5=
600x4=
4800-2=
84+7=
8x9+21=
50x9=
200-2=
80 - 44=
4600+4700=
70x7=
30-3=
1800 - 900=
730 - 190=
8x800=
6000-2=
4900 - 1800=
3700 - 370=
5x500=
36-3=
420+80=
8500 - 5500=
19x4=
800-4=
430+1000=
3200+5100=
()x3<25
300-3=
500 - 60=
96 - 42=
2x ( ) <15
48-2=
89 - 8=
1200 -400=
()x4<25
99-9=
64 - 8=
830 - 300=
4x7+9=
26-2=
34+9=
800+900=
3x6 + 7= 3
600-3=
14-7=
58 - 36=
x9 + 4=
38-1 =
5+58=
7000+3000=
6x6 + 7=
93-3=
64-8=
5x7=
9x2 + 8=
77-7=
6x3=
72-9=
4x7+5=
400-2=
9x9=
36+6=
40-2=
800-4=
72-8=
81-9=
80-4=
5000-5=
78+15=
42+13=
48-2=
500-5=
83 - 20=
24-3=
400+2=
84-4=
43 - 30=
24+8=
800-4=
900-9=
9-1 =
27 - 32=
480-2=
400-5=
280+450=
42+13=
4000-2=
27-9=
7-7=
42 - 6=
8000-4=
53+8=
3600+5800=
7+44=
42-7=
2x8-4=
9x3 - 8=
18-6=
64 - 8=
8x9亏9=
30-6=
15-3=
21-3=
36-6-3=
36-4=
6+3=
4x8=
9-9x6=
4x5+44=
25-5=
54-9=
42-7x6=
48-8+7=
20-5=
49-7=
96 - 80+7=
1800+200=
5-5=
42-7=
64 - 40 - 8—
93 - 80=
306：
35-7=
40 - 4+20=
6x5+37=
9-3=
19+41=
7x5 - 8=
10 - 8-1 =
4x3=
24 - 6x3=
14-7+25=
7x8=
16-4=
4x8 - 5=
15-5+8=
73 - 4=
12-4=
27-3+6=
8x9 - 8=
3x8-4=
8-2=
56-7 - 3=
1x2+20=
7x6+10=
24-4=
49-9+7=
16-8+30=
72-8=
4x4=
4x3-2=
7x7+8=
64 - 8=
20-4=
6-3x7=
54-6+33=
24x0=
24-6=
8-4x3=
510+200=
71 - 7+30=
2x5=
6x5+37