文档介绍：138-89=
5400:54=
200x34=
550-450=
18000-600=
150+70=
356-98=
125x8=
6124-6=
12x80=
41+184-2=
75-11x5=
42+7-29=
45+15x6=
2504-5x8=
336+70=
25x9x4=
200-33x3=
8404-21 =
5604-14 =
(804-20)-4=
70+(10x5)=
36x11=
1025^25=
80+604-3=
240+570=
48004-400=
370+580=
580-490=
910-370=
120+90 =
543-306 =
300-12 =
120x5 =
12 + 18 + 14 =
62+160+38 =
14x60 =
203-80 =
50x15x4 =
175-56 =
250x8 =
420x20 =
25+67+75 =
4500-300 =
25x38 =
54+97 =
560-40 =
145+55 =
46+49+51 =
9100-70 =
103x3 =
28x99 =
436+208 =
323-197 =
630+45 =
350+470 =
8x (125+50)=
4024+8 =
15x12x5 =
315-198 =
84+27+73 =
35x102 =
621-199 =
168-4 =
574-162-38 =
(25+24) x4 =
32+268 =
100-43 =
416-216-78 =
99+232 =
45+65+55 =
24x25 =
640+40 =
810+27 =
420-150 =
34X72=
28X25= 26X
51=
93X 14=
412X
21=
157X43=
315X17=
124X35= 408
X36=
120X24=
230 X
40=
450X300=
3434-7=
4564-
6=
8774-4=
7284-18=
203+98=
300=
240+570=
48004-
400=
370+580=
580-490=
910-370=
789X63=
79X412=
123X70=
603X21=
284 + 320 =
803 - 410 =
988X23=
399X42=
18004-
753-299=
184 +
538X48=
502X97=
138X16=
407X35=
930X22=
526X80=
203X95=
526X82=
825X89=
620X74=
321X26=
287X63=
209X28=
302 X25=
139X50=
535 + 122 =
582 - 423 =
366 + 297
21X 15=
243X53=
126X56=
315X38=
126X56=
315X38=
818 - 327 =
114 + 487 =
124 =
124X73=
215X46=
153 X 28=
142 X 27=
47=
134X16=
153X23=
382X 12=
135X14=
158 - 126 =
568 - 283 =
143 -
224X36=
182 X
246X34=
146X15=
164X32=
145X54=
254X36=
217 X 83=
139 X 43=
328 X
25=
322X24=
145X27=
679X 13=
286 X 35=
427 X 46=
321 X
61=
186X54=
345X25=
312X82=
178 X 42=
126 X 46=
547 X
12=
142X56=
321X34=
632X71=