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