一、脱式计算。
123494555
+ ×                      × - ×                    ( - )×36           63721256612185196666
×( - )                   (13+ )×                        ×12+     33691313135355622   ×57                        + ×16                     × + ÷5
5
81883 ×(3 -21 ×16 )             57
14213 +7 +3 +7
7 ×48             1
17
13÷6267+3÷7                     41553447
83115 ×4 -6 ÷ 12                      57 ×126 +7 ÷6                        465127 -(517 +2 )                    [1-(42
45 ×4517 ×4 -3                     4
1717910 ×11-910                    4355 ×8 ×9                    10117 ×34×7×217     143598                     514672136            54 ×56 +156 ×4              32.6×4634                     14 +38 )]÷14  59 ×6+41
9 ÷6         5151557 ×14 +34 ×
×17 -1
7          23161625 ×17 +25
×3513204
169 +271 )×23+2571×4
5
+32.6×0.2 13118 ×4 +8 ×4
18 ×58+18 ×180÷2.5÷             (
410410                96-3.2×0.5+0.4                 9.6÷(9.6×4)           53532.08×(9.6÷2.4)÷4.8        78×0.69+1.2×6.9+6.9            0.78÷0.25×4
5737138535    ××                 ÷÷                         ×÷
1225149236598815413515÷+×7       (13+)÷13                     ×÷×
955551521773    81112()3[1()] 2.6×1.9÷2.6×1552431.9     17.÷4.9+6.73              3.4÷[(1.2+0.5)×5]           0.25×12.5×3.2
453511111+                   (-)14                    (+) 7979153127287                     2.65×1.7+1.35×1.7              23.4÷7.8-882.1
0.75×18÷0.15                 2.5×3.2×1.25                 2842÷14+74×3
413412+-+                   5.2-11÷7-×3              4÷1+6×
3757573 5336325×4÷4×                ÷[(-)÷]           445436111111+++++ 2481632  7.6×÷[1.9-1.9×(1.9-1.9)]            (5  -1.8)÷[(1.15+ )×1
2 ] 3
32
14  -6.46-3.54           4.2÷1.5-1.5×0.6           (0.92+ )÷(4
17257-2  )
9
533224 (4  -3  )÷( + )                          51.6÷[(3  -1.25)× ] 14755
19.98×37-199.8×1.9+1998×0.82                      9999×7+1111×37
23111231÷231               (70+)×             8.×36+8.×63+8.
2326968
12251320
1-1÷2-1÷3-
1200511                2007×                 216×( - 6200633124
1.65÷5+1.29×0.2+
2133×20%                       (+)×3+
15125503713114×[-(-)]          24×(-)÷           4.85×0.17+0.485×8.3      94186521634511+×99+            2-2.86×(6.25-6)            54.2- +4.8-            991471451
0.7÷[( - )×24]        1.47÷(2-1.02)+0.61×14       2000÷12.5÷25
÷0.8÷4
78÷9×3355÷72              ÷49
25×1115+2155÷4             [(-110)      7.28-(1.25+0.28)           99902.5
15 ÷[(23 +115 )×13 ]         4÷2.5 (1÷27+27÷1)÷5.1       ×35    [1-(1315+10)]÷8             5612÷[23×(16+13)]               4.85-59 +5.15-49              ×17
34 ÷[(45 +14)× 37 ]        10.2-(1.25 + 2.5)÷1.5        1+ 1
9
)      23+(45-253)×3                (45-14)×6911]÷20             (×200.8+1×2008               0.823×0.6+0.6÷314         33.02(1.6×538+3.6÷44)×29×(4537+8-4)            23+13×34                 1125113 +13 ×(2 -3 )     4175315                   18 ÷(144 + 2.5×5 )115+349)×15-451142+4)÷(5÷4×4×12.5×-(148.4-90.85)35×7.27+2.73
(536-4)÷(114+6)
511×[(21553)÷6]
5×(115+217 )
6627 - 7 ×( 13 + 9 )  67 - 627 ×( 3
1191
×40- ÷               1610
253434×(
11211+)×13                   [1-(-)]×
2431713
(-×
57872451)÷                ÷[(-)×3]          (8×+÷)×
22156399812.5
51131115121    +×                ÷[(+)×]           (+-)÷
963584401220653191155 ×-÷7             8.24-2.4÷2.5÷0.4                   2-÷÷
52071673   41145121  1(2.5)               6.75-1+3.25-2             ÷[×
8456(16+13)]
23563438         711275110                  36   11921516148÷[10-(5+4)]            8711
19385265511                     1235325                      38 ×4÷38 ×4                 5843+5384                     (412-3310)×(4-213)       17×3.3[383135(140.15)]
21121573355×15+5÷4            8÷9×5÷72                     53 [(45-14)×611]÷920       (12+14)÷(45÷4-110)            (45÷49
11111112+6+12+20+30+42+156+172+90    125×(56+16312)+0.8         11÷〔11×(4+6)〕           4
5
)]  [32373484(168)]                 (145)15                  623(11312918)×38562435       12 ÷ 524 × 3  58 ÷ 7712 ÷ 10        (113+1.5)÷114]           23+(45-23)×1315+49)×15-920 ÷ [ 12 ×(25 +
511×[(2153)÷
[5] 6245255 ×(÷+ )                              51.6÷[(3  -1.25)× ]
556966272132
(0.92+ )÷(4-2  )                 (5  -1.8)÷[(1.15+ )×1  ] 2595203(
41771121 + )÷ +     [1-( - )]×       3.×[1÷(2 -2.09)]   54310243105573113817
+1 +2 +3. 375)×         + ÷  +        ( +0.2)× ÷(31281220984938
(2
—0.5) 75
120.24-20.87557
1224           25.43133339253(13) 561021553853311+)÷×             ×〔÷(-)〕            ÷[(+)
5536111220(
1]    61359(+)×24                0.5+×(0.15+) 34620432×3.8+5.2×80%+0.8       (-)×12÷0.1 543×
1 1×3
+
1 3×5
+
1 5×7
+……+
1
17×19
+
1
19×21
11111+ 1223344556
1111
+ + +……+
1×2×32×3×43×4×548×49×50
二、解方程。
X=
11428                         X×(1- )=3.6                    - 425391    103110721  ×(X- )=0                  5X-3× =                      5- X=   437533114192   5×(X- )=2                                       1
31543251231
χ×(1+ )=250                 χ- χ=0.3                     χ+ χ
457419
=       5
11811χ×(1- - )=550                 10×X=                      33÷X=
452520133111 X××=4                    X×=18×                   χ+χ=
3635549.5
3.2×4+50x=112.8            0.3x-0.8×60=72                5.9x-2.4x=7
5×1.3-2x=5.5                5x=2.1
3.2×4+50x=112.8             0.3x 5×1.3-2x=5.5            0.841.6
34χ+516χ-6=3               11.3=9.9
4×(x-0.8)=8                    x-0.15x=8.5                   0.816x-6.4x=36                    1-334=5                     -2+1.8=3.6                 7-0.8×60=725.9             x×(7.2+х)=7.92             6.2-233=5                     412
4 ÷x=3
(6+3x)×(x-0.4)=8                   x135x10                           x7x63.9                     (x-1.2)-2.4x=7     х-х=
-7×
÷2=18
11
2 x + 3
x=15
-35 x =315  5x41187
x