文档介绍：脱式计
245 —(45+39) 125X (8X4 ) X5 41 X25-25
420^( 205 — 198) X4 460-( 29 — 18 七) 135 - 15+26 107-35 X 3206 X 3-128 - 4 (482-42 ) - 22-17 57 - 3-12
168 - 12-48 - 12 182 - 13+208 - 13 525 - 21-378 - 21
32 X 5 X 6-6 48+42 - 6-12 60- (30 - 3+3)
31 X 13-228 - 19 (156 + 224 - 32) X 80 345 - (128-531 - 9)
776- (73X 6+152) 80 - 2+100 - 5 45-20 X 3 - 4
140-20 X 5+25 20 X 30+20 X 40 25 X (30+10)
800 - 40-400 - 40 600 - (120 - 60) (26+14) X 70
(26+14) X (70-40) 90 - (30 X 15 - 50) (35+45) - (90-10)
6 X 10-(21+29) 25 X (22+26 X 3) 80 - (32+8) X 300
3000-[(32+8) X 30] 30 X [169-(60+9)] 320-(120+25 X 4)
36 - [(3+6) X 2] 180 - (36 - 12)+6 450 - 15+10 X 3
(40+180 - 30) X 2 (240+180) - (30 X 2) 800-800 - 80 X 30
800-(70 X 6+180) 65 X (40+20 X 3) 36+360 十 125 X 121+79 X 5 45 X 6+35 X 6 67 X 5-37 X 5
39 X 8-6 X 39 326 X 78-326 X 68 120 X 90-110 X 90
125 X( 8+4) 12 X( 40-5) 5 X 27+63 X 5
64 X 9-14 X 9 23 X 134-34 X 23 68 X 48+68 X 52
48 X 101-48 65 X 5+35 X 5 49