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1、递等式计算(能简算的要简算)4 8 18 20 60 66 ()27 50 4 8 18 20 60 66 ()27 50 12 30 9 50 6 17 ()32 () ()16 4472 + + 0.257.890.4 3212.52.5 3.67.2+3.62.8 + 24(+) (+)40 75 63 98 88 23+ 82 48+ +21 (+)24 36+24 ()60 ( )169 + 36(+) + 57 26+ 15+20 2449( ) ()60 4 8 18 20 66 ()27 60 50 4 8 18 20 66 ()27 60 50 30 12 9 50 6 17

2、 ()32 16 4472 21 56 7 5 317 + 3717 1036 (+) 100 13 5 212 2 3 9 322 45 121 12 2449( )3.6 27 + 18 13 12 ()5 1.6 15 + 72 75 63 24 48 28 80.875 150 3.25 2 120 ()5 118 15 3212.52.5 24 + 3.67.2+3.62.8 108 1 11 0.257.890.4 + 7 1 24(+)42 34 (+)40 4 42 +21 35 2 4.5 48+ 17 823 2 3 ()606 2 4 +6 4 5 3717 (+)24

3、7 2 4 36 (+) 3 7 36 5 6 10 6 7 6 10(1) 12 2 15 1 0.498 88 23+ 36(+) 0.80.8 36+24 11 3 5 8 4 24 ()60 4 4 9 ( )1698 5 1 (0.4)(0.5)12 9 2 1- () 11 01 () 0.32 62.4 44 66 () () ( + ) (5) (0.75)0.4 110.25(1) () 36 =30 1414 36( ) (+)9+ 3.25.60.51.250% 8= 654.4=40 2( ) 1.8 -x=45 () 1 += -=14 7-=2 -= 5 += 5

4、2 17 36(-)3 9 - 52 () + -= 12= = =15621 14 + (-9)(+)(1-) 1() 36() (3.2) 1 2-3.25=0.75 (1) 5 12=1 7 1 (1) =3.6 0.2-2.65=8 () +1.5 5 0.92 0.8XX121 5X3 X12 6X5 =13.4 X X= 2X + = 3X= X= XX= 4X6=2 X= X = X = 8 1 463 5X= X= X=5.48+8.73+4.52+0.27 (6.3-6.30.9)6.3X = 4x3 9 = 29 x + x = X21=4 (1514) (+ ) +2.4

5、=6 1.8=2.4 631.8=7.2 175=2.4+3 = 12.62=8 (4.8-1.6+) 180.25+ 6.380.37+0.373.62(1) 7 (+) = +0.5=4 413=314.5+8=27 2+4.33=14 (1) 15+15 25() (+)9+30(+) + + ()(+) 342.5 3163102 47.112.5 0.329.1 x 3+2 13189.247.112.5 = + (+) ()70 9+ 12(1) (1) (1)497 8+2 (+)722.40.452=0.3 6.35=4.1 2.5=0.6 = +1.2=3.4 X(+)= +

6、 = 2 = 31.42=1.1 += 5.53 = 1.75 + = 72(+) 12(+) 4 48(+) 5 (+)6027 = 40 = = + = 18 = 15 (+)= 7 (9+ 24(+) + + 2 30(+) + 2003 10102412 5.21 X = 15 X(1+)= 25(1)X = X = 10 X = 8 X = (1+)= 25 (1) = = 10 = 8 = 15 = 1(+) 3 (1) (+) 25() + = 18 = 24 = 4 74 = 21 = 18 = 10 12(1) (1)4 (+) (1) 8 33 2574 1027.35.1

7、 3441.7 1.25( 2130.8) 700145 18.62.50.4 1.960.54 12.065.072.94 30.349.7610.34 17+7 1 11+7+3 933-15.7-4.3 73+ 8+224(-+) (12+) 7 (7-) 7+(-)12.065.072.94 30.349.7610.34 33 2574 +x = 20 +45 = 12 6X5 =13.4 X-X=()(+) 1(+)3.5 (1)4 + X= X=20 X=12 X=() (+)(1) 3+ +X= X-0.25= 4+0.7X=102 X+X=42 72(+) 2 + + X+X=

8、105 X-X=400 X-0.125X=8 X+X=18 +7 4 (9+) + X( + )= x0.375x= x+=4 XX12+ 2 30(+) +0.365- x = (x- 4.5) = 7 x- 0.8x = 16+6 20 x 8.5= 1.56 +5 12(+) +x- x -4= 21 XX= +2.4=6 1.8=2.44 48(+) 9+ 24(+) 631.8=7.2 175=2.4+3 = 12.62=8(+)6027 5 ()70 97 = 413=31 4.5+8=27 2+4.33=148+2 15+15 (+)72 72(+)(1)1 342.5 3163

9、10225 13.098.124.88 12103450075 () +X = 2X = 3X1.42=1.1 X+=()1511 37.519.52.54 55() 10(43)0.75 5 = = = X 0.6 X =18 525370.4 750.394 1253916 X + 2.58=95 X+30=80 4+ = 9 -= 10199897 X = 24 X = 4 X = 18 7X4X = 21 1352 1364.064.0664 7.021238777.02 4X+x = 20 x+45 = 12 = (+)= 1025.65.62 4710.250.2571 43126

10、8613X = 4 x x+45 = 12 = (+)= 8x3 +5x3x = 1.75 X+ = 15X = X = 18 3 + 1(+) 347.112.5 0.329.1 x 3+2(1) 7 ()(+) 1(+)3.513189.2 47.112.5 3 + + 18(+)= 2.40.452=0.3 6.35=4.1 2.5=0.67+5 ()24 (+) (+)= +1.2=3.4 +2.4=6 1.8=2.43 + ()30 3631.8=7.2 175=2.4+3 = 12.62=87+5 ()24) (+) (+)= +0.5=42 413=31 4.5+8=27(+)9

11、+ 30(+) (+) 5+2+4.33=14 (1)1 342.5(1) 7 (+) 3163102 47.112.5 0.329.1 x25() + ()(+) +3+2 13189.2 47.112.5 (+) 12(1) (1) (1)4 = 2.40.452=0.3 6.35=4.1()70 97 8+2 15+152.5=0.6 = +1.2=3.4 2X = (+)72 72(+) (+)9+ 30(+)+X = 3X1.42=1.1 X+= 5.5x3x = 1.75 X+ = X = 15 X(+)= X(1+)= 2512(+) + 4 48(+)(1)X = X = X

12、= 8 X = 9+ 24(+) (+)6027 515X = X = 18 X = 24 X = 18(9+) + + 2X = 4 7X4X = 21 X+x = 20 x+45 = 1230(+) + 10102412 5.21514.5=(5110X)3 3X2(10X)=15 (1X)3=2X X25X5=X195551311115 250.320.25 55() 2005 5 = = = X 60% X =18 10(43)0.75 25370.4 750.394 X + 2.58=95 40%X+30=80 4+ = 9 -= 1253916 x30 6x X = 4 x+45

13、= 1210199897 41352 1364.064.0664 = (+)= 7.021238777.02 1025.65.62 431268613 8x3 (x6)25 4710.250.2571 41352 1364.064.0664 7.021238777.02 X = 18 = 10 X = 4 X = 18 1025.65.62 4710.250.2571 4312686134:6=15: :=: 3.5: =5:4.2 = = 1.25:5=0.75: :=:6 : =: = +:0.3: :0.2580: :12 :=12:33 + 1(+) 3:0.6:4 :: : : :

14、:(1) 7 ()(+) 1(+)3.5= 1.6: x:1: 25 13.098.124.88 12103450075 () +X = 2X = 3X1.42=1.1 X+=()1511 37.519.52.54 1253916 5.5x3x = 1.75 X+ = 15X = X = 24 55() 10(43)0.75 25370.4 750.3947X4X = 21 X+x = 20 x+45 = 12 10199897 5 = = = X 60% X =18514.5=(5110X)3 3X2(10X)=15 (1X)3=2X X25X5=X193 + + 18(+) X + 2.5

15、8=95 40%X+30=80 4+ = 9 -= 7+5 ()24 (+) (+)= (+)= x30 6:x:3 + ()30 3X = 4 x+45 = 12 = (+)=7+5 ()24) (+) (+) 8x3 (x6)25(3217) (25) (+)9+ 30(+)70%X + 20%X = 3.6 25% + 10X = X - 15%X = 68 =30% (+) 5+ 2410.5-354939 = 3.5: =5:4.2 = =(-)21+ () 0.253212.5 24x- 25%x = 10 X25%X=90 = +50%=4216 ( 18( 15.64-+4.3

16、6- 1.6: x:1: 47.112.5( 7.52.37+250.189 60( ( :0.6:4 :: 0.329.1 20-( 5.17-0.38-1.62 1.253.6+1.253.4+1.25 35(1-3.145.3+3.144.7 8302527+935 36.5-6.54.72 108(x : : : : 3+2 242.4-2.50.4 ( 24.5-(7.58+) :12 = 2.5(1.920.3-5.9) 67.5314-(19.376-2.4686) (1-1535) :0.3: 13189.2 :0.2580: 47.112.5 24-4.8(2 121.43+

17、0.5712-12 0.99+9.999+99.9 (:=12:3 2.40.452=0.3 :=:0.1 6.35=4.127216+2046 (22725-4.68)0.11 7.75-2.4+2.25-6.6 1.25:5=0.75: :=:6 2.5=0.6 =3.7-0.25(3-1.6) 98.6-29.3+11.4-30.7 5.3 : =: = +1.2=3.4 4:6=15:2.651.7+1.351 (12.42.5-2)19 (1.9-1.90.9)(17.6-17.41) 24+765 :=: +2.4=6 3.5: =5:4.2 1.8=2.40.6255.8+ 92

18、 126028+6352 (= 631.8=7.2 175=2.4+3 = ( 53-7( 3.799+3.7 +50%=42 413=31 4.5+8=27 2+4.33=140.510.6(4.5+) 15.296+15.25-15.2 82 = 12.62=8 = =12184 1.37128-281.37 +1.7+5.3 0.471+28+40%2 = 31.42=1.1 += + = 515 15.814.2 997.4(x2.1)=6 (7x - 4)+3(x - 2)= 2x +6 12x8x1228 3(2x1)10=37 69 74.835.2 20%3.86.220%20

19、% 3x+ 7x +10 = 90 3(x - 12)+ 23 = 357 7x82x27 5x 18 = 32x28() 5.855.85 X5 0.7(x0.9)=42 1.3x2.43=12.4 x(30.5)=12 7.6-3.25-3.6 0.1255.60.7 53-x2=8 4(x-5.6)=1.6 1502+3x=690 xx1.4() 99%1% ()48 10-79-230x+25=85 1.48-2x=6 6x-12.83=0.06 7(6.5+x)=87.50.875+50.8750.02 () 45 0.82.750.9 x-0.7x=3.6 91x=1.3 7(x-

20、2)=2x+3 18(x-2)=270150.125312.5%4 3.80.70.76.2 ()3200=450+5X+X X-0.8X=6 7.5*2X=15 x+5.6=9.4 0.310130% 0.250.37548 18.518.518.5 49(0.5+x)+x=9.82 2(X+X+0.5)=9.8 25000+x=6x 12x-8x=4.810107201825 2.058(2118.5) () 8.1(110%) 1.6x3.4xx527 2(3x4)(4x)4x (3x5)2(5x9)3 + = 1(+) 3 (1) 7 1.6: x:1: :0.6:4 (+) 25()

21、 + x- 25%x = 10 X25%X=90 = +50%=42()(+) 1(+)3.5 (1)4 + = 3.5: =5:4.2 = =(+) 12(1) (1) (1)470%X + 20%X = 3.6 25% + 10X = X - 15%X = 68 =30% 8 () (+)(1) = 10 74 = 21 +x = 20 +45 = 123+ + 72(+) 2 = 18 = 24 = 4 = 18+ + +7 4 = 10 = 8 = 15 = (9+) + + 2 = 15 (+)= (1+)= 25 (1) = 30(+) + 6 +5 = 40 = = + = 18

22、12(+) + 4 48(+):: : : : :19.9837-199.81.9+19980.82 0.87.7+3.30.8-0.8 75% 5- X X= 2X + = 70%X + 20%X = 3.6 X - 15%X = 680.1255.60.7 761.04+1.0425-1.04 (0.10.6+0.94) 2.54.4 X=20 25% + 10X = 5X3 X12( XX121 6X5 =13.4 3X=70%24.5+0.776.5-0.7 1.08(3.94+34.30.2) 8.76-5.29-2.71+1.24 10.25+0.251-2.50.1X= XX=

23、4X6=2 X = 18.753.8-8.753.8 210056() 12() 0.6250.5+X= X = 4x3 9 = 29 x + x = 495.618+0.418 1.750.8+9.21 168(4.32-0.4)X = X21=4 X-X= 46381(3.25-0.6) 371.25768 4.05-2.74-1.26 (48+110030)72 6X5 =13.4 5X= X= X= ( 9 1.441.2(0.742+0.458) 78199 X=12 X= X= =30% 95.68+0.40.1258 100.65-45.63+9.35-14.37 25 (999

24、9+99)0.99X= X-0.25= X+X=42 X+X=1050.07287.5+8.750.28 351.250.082 2400.25+0.2540 4+0.7X=102 X-X=400 X-0.125X=8 = 4- 18.3470.5 18( X+X=18 X( + )= x0.375x= 5 X2.458 1(6.8-0.75) 92.50.4 3.799+3.7 x+=4 XX12 (x- 4.5) = 7 x- 25%x = 10 1500-1580 6.25- 40162.5 8546-23911+775 14.58-1.588+31.21.20.365- x = x-

25、0.8x = 16+6 20 x 8.5= 1.5 x- x -4= 21 0.246519+26.44.81 6.4(1- 21.6-0.840.84 0.1255.60.7 X25%X=90 XX= +2.4=6 3.5: =5:4.2 (6.25-1 98 60(1.8=2.4 = 631.8=7.2 175=2.4+3 ( ( 18(= = 12.62=8 = 4299142 1012.852.85 0.575191.94.25 9.613+2.4=6 3.5: =5:4.2 1.8=2.4 =1.250.582 (12.50.05)8 2.75291.7529 27861998 631.8=7.2 175=2.4+3 = = 0.631.37 45102 (32)4 ()12.62=8 = =

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