文档介绍：25X2 =
45 X 9 =
11+22 =
115-24 =
25X4 =
35X2 =
125-26 =
564-12 =
25X6 =
35X4 =
456 + 45 =
45X10 =
25 X 8 =
35X6 =
90-19 =
45-23 =
25 X 3 =
35 X 8 =
12 + 24 =
456-12 =
25 X 5 =
35 X 3 =
130-27 =
56-45 =
25 X 7 =
35 X 5 =
879 + 54 =
56X12 =
25 X 9 =
35X 7 =
95-20 =
78-23 =
15X2 =
35 X 9 =
60-13 =
25X6 =
15X4=
125X2=
146-23 =
125X4 =
15X6=
125X4=
457 + 456 =
25X7 =
15X 8=
125X6=
100-21 =
26 + 9=
15X 3=
125X 8=
65-14 =
57-38 =
15X 5=
125X 3=
546-457 =
1500-700=
15X 7 =
125X 5=
7+ 14=
42X2 =
15X 9=
125X 7=
105-22 =
660+3 =
45X2 =
125X 9=
70-15 =
960+3 =
45X4 =
123+25=
896-546 =
180+9 =
45 X 6 =
80- 17=
8+ 16=
65+15 =
45 X 8 =
10+20=
110-23 =
50 + 5 =
45 X 3 =
120-25=
75-16 =
3X800 =
45 X 5 =
248+89=
155X5 =
420+7 =
45 X 7 =
85- 18=
9+ 18=
3X220 =
420-20=
60 + 4=
18X4=
15X5+5=
93+3 =
120-50=
320 X 3=
600-50=
880 + 4 =
300-64=
60X15=
56X2=
1200-200=
64 X 10=
72 + 6 + 2=
200-36=
0+ 51 =
6 + 6X7=
400 X 3=
15+5X 3=
0+76 =
400 X 5=
8+2X 20=
380+50=
0X85 =
50-31 =
22 + 40=
789+0=
70+7 =
425 X 0=
7X 8-7=
300+5=
25 X 3=
528-0=
56 + 8=
15X4+8=
268+125=
450+80=
380-190=
680X0=
280+40=
57+ 140=
400 X 6=
40X25=
66-22=
800X 2=
50-23=
6X6+6=
46X20=
3000-400=
35X0=
43-24=
85-42=
420+7=
40X6=
11X9=
90-31 =
6X80 + 20=
300 X 6=
120X3=
60 X 9=
420-330=
7+3X4=
360+80=
55+41 =
5X28=
90-26=
300X7=
30X4=
60 X 5=
8X6+7=
85+ 47=
81+12=
17X 3=
52+23=
310X3=
400X5=
12+88=
6X4+2=
200X5=
45+3=
630+9=
120X4=
320X2=
51 + 31 =
350+7=
80X5=
660+6=
13X 3=
700X 2=
40X5=
700X2=
80 x 3=
450+500=
200 + 800=
5X9+6=
70+550=
360-80=
24-6=
3X8+9=
800X6=
50+800=
8X 3=
9X2+4=
500X4=
9X6=
3000- 1500=
5X200=
540 + 9=
72+8=
760 + 60=
()X 5<37
14X 5=
28+7=
35 + 7=
7X ( ) <43
350-80=
5X9=
27 + 53=
()X 9<64
570+50=
360-30=
240-120=
4 X 400=
23 X 3=
730-700=
5000-500=
900X3=
180 + 3=
18+3=
3600-600=