1.25 X( 8+10)
=1.25X 8+1.25X
10
=10+12.5=22.5
9123- (123+8.8)
=9123-123-8.8
=9000-8.8
=8991.2
1.24 X 8.3+8.3 X 1.76
=8.3X( 1.24+1.76)
=8.3X
3=24.9
9999X1001
=9999X( 1000+1 )
=9999X 1000+9999
X 1
=10008999
14.8 X 6.3-6.3 X 6.5+ 8.3 X 3.7
=(14.8-6.5)X 6.3 + 8.3X 3.7
=8.3X 6.3+8.3 X 3.7
8.3 X( 6.3+ 3.7)
=8.3X 10
=83
1.24+0.78+8.76
=(1.24+8.76) +0.78
=10+0.78
=10.78
933-157-43
=933- (157+43)
=933-200
=733
4821-998
=4821-1000+2
=3823
I32 X 125 X
25
=4X 8X 125 X 25
=(4X 25)X( 8X 125)
=100X1000
=100000
9048 - 268
=(2600+2600+2600+1248)- 26
=2600 - 26+2600 - 26+2600 - 26+1248 - 269
=100+100+100+48
=348
2881 - 43
=(1290+1591)- 434 =1290-43+1591 -[-3]+[-2]+[-1]+0+1+2= -3
=30+37
3.2 X 42.3 X 3.75-12.5 X 0.423 X 16
=3.2X 42.3 X 3.75-1.25X 42.3 X 1.6
=42.3 X (3.2 X 3.75-1.25 X 1.6)
=42.3 X (4 X 0.8 X 3.75-1.25 X 4 X 0.4)
=42.3X (4 X 0.4 X 2X 3.75-1.25 X 4X 0.4)
=42.3 X (4x0.4x7.5-1.25x4x0.4)
=42.3
X [4 X 0.4 X
(7.5-1.25)]
=42.3 X [4 X
0.4 X
6.25]
=42.3 X (4 X 2.5)
=4237
1.8+18- 1.5-0.5 X 0.3
=1.8+12-0.15
=13.8-0.15
=13.65
6.5 X 8+3.5X 8-47 =52+28-47
=80-47
(80-9.8) X 5 分之 2-1.32
=70.2X2/5-1.32
=28.08-1.32
=26.76
8 X 7 分之 4 - [1- (3.2-2.95)]
=8X 4/7 - [1
1 - 0.25]
=8X 4/7 - 4
=8/7
2700X( 506 — 499)-
900
=2700 X 7 -900
=18900 - 900
=21
33.02 —( 148.4 — 90.85)- 2.5
=33.02- 57.55 - 2.5
=33.02— 23.02
=10
(1 - 1 — 1)- 5.1
=(1 — 1)- 5.1
=0- 5.1
=0
18.1 +( 3— 0.299 - 0.23)X 1
=18.1 + 1.7 X 1
=18.1 + 1.7
=19.8
[-18]+29+[-52]+60= 19[-301]+125+301+[-75]= 50
[-1]+[-1/2]+3/4+[-1/4]= -1
[-7/2]+5/6+[-0.5]+4/5+19/6= 1.25
[-26.54]+[-6.14]+18.54+6.14= -8
1.125+[-17/5]+[-1/8]+[-0.6]= -3
卜98+76+(-87)]*23[56+(-75)-(7)]-(8+4+3)
5+21*8/2-6-59
68/21-8-11*8+61
-2/9-7/9-56
4.6-(-3/4+1.6-4-3/4)
1/2+3+5/6-7/12
[2/3-4-1/4*(-0.4)]/1/3+2
22+(-4)+(-2)+4*3
-2*8-8*1/2+8/1/8
(2/3+1/2)/(-1/12)*(-12)
(-28)/(-6+4)+(-1)
2/(-2)+0/7-(-8)*(-2)
(1/4-5/6+1/3+2/3)/1/2
18-6/(-3)*(-2)
(5+3/8*8/30/(-2)-3
(-84)/2*(-3)/(-6)
1/2*(-4/15)/2/3
-3x+2y-5x-7y
1437 X 27+ 27 X 563 〔 75- ( 12+18)〕- 15
2160 -〔( 83-79 )X 18〕280 + 840 - 24 X 5
325- 13X (266 — 250) 85 X (95 — 1440- 24)
58870 - (105 + 20 X 2) 1437 X 27 + 27 X 563
81432 -(13 X 52 + 78) [37.85- ( 7.85+6.4) ] X 30
156 X [(17.7-7.2) -
3] (947 — 599)+ 76 X 64
36X (913 — 276-23) [192 —( 54 + 38) ]X 67
[(7.1-5.6 )X 0.9-1.15] - 2.5 81432 - (13 X 52 + 78)
5.4 - [2.6 X( 3.7-2.9) +0.62] ( 947 — 599)+ 76 X 64 60 — (9.5 + 28.9)] - 0.18 2.881
- 0.43 —
0.24 X 3.5 20 X [(2.44 — 1.8) - 0.4 + 0.15] 28-(3.4 1.25 X 2.4) 0.8 X〔 15.5-(3.21 5.79)〕 (31.8 3.2
X 4) - 5 194— 64.8- 1.8X 0.9 36.72 - 4.25
X 9.9 3.416- ( 0.016X 35) 0.8 X [(10 — 6.76)- 1.2]
(136+64 )X( 65-345 - 23) (6.8-6.8X 0.55) - 8.5
0.12 X 4.8 - 0.12 X 4.8 ( 58+37) -( 64-9 X 5)
812-700-( 9+31 X 11) (3.2X 1.5+2.5)- 1.6
85+14X( 14+208 - 26) 120-36 X 4 - 18+35
(284+16)X( 512-8208 - 18) 9.72X 1.6-18.305 - 7
4/7 - [1/3 X( 3/5-3/10 ) ] (4/5+1/4 )- 7/3+7/10
12.78 — 0 -( 13.4 + 156.6 ) 37.812-700 -(9+31 X 11)
(136+64 )X( 65-345 - 23) 3.2
X( 1.5+2.5)- 1.6
85+14X( 14+208 - 26) ( 58+37) -( 64-9 X 5)
(6.8-6.8 X 0.55) - 8.5 (284+16)X( 512-8208 - 18)18. 14 X 8/7 5/6 X 12/15
0.12 X 4.8- 0.12 X 4.8 ( 3.2 X 1.5+2.5)* 1.6
120-36 X 4- 18+35 10.15-10.75 X
0.4-5.7
5.8 X( 3.87-0.13) +4.2X 3.74 347+45 X 2-4160 - 52
32.52- (6+9.728 - 3.2 )X 2.5 87 ( 58+37)-( 64-9 X 5)
[(7.1-5.6 )X 0.9-1.15] - 2.5 (3.2 X 1.5+2.5)- 1.6
5.4-[2.6 X( 3.7-2.9) +0.62] 12 X 6-( 12-7.2) -6
3.2 X 6+ (1.5+2.5) - 1.6 ( 3.2 X 1.5+2.5)- 1.6
5.8 X( 3.87-0.13) +4.2X 3.74
33.02 —( 148.4 — 90.85)- 2.5
1)23+(-73)
(2) (-84)+(-49)
(3) 7+(-2.04)
(4) 4.23+(-7.57)
(5) (-7/3)+(-7/6)
(6) 9/4+(-3/2)
(7) 3.75+(2.25)+5/4
(8) -3.75+(+5/4)+(-1.5)
(9) (-17/4)+(-10/3)+(+13/3)+(11/3)
(10) (-1.8)+(+0.2)+(-1.7)+(0.1)+(+1.8)+(+1.4)
(11) (+1.3)-(+17/7)
(12) (-2)-(+2/3)
(13) |(-7.2)-(-6.3)+(1.1)|
(14) |(-5/4)-(-3/4)卜|1-5/4-卜3/4|)
(15) (-2/199)*(-7/6-3/2+8/3)
(16) 4a)*(-3b)*(5c)*1/6
I. 3/7 X 49/9 - 4/3
2. 8/9 X 15/36 + 1/27
3. 12 X 5/6 - 2/9 X 3
4. 8X 5/4 + 1/4
5. 6- 3/8 — 3/8 - 6
6. 4/7 X 5/9 + 3/7 X 5/9
7. 5/2 - ( 3/2 + 4/5 )
8. 7/8 + ( 1/8 + 1/9 )
9. 9 X 5/6 + 5/6
10. 3/4 X 8/9 - 1/3
0.12 x + 1.8X 0.9=7.2 (9 — 5x )X 0.3=1.02 6.4 x - x =28+4.4
II. 7 X 5/49 + 3/14
12. 6 X( 1/2 + 2/3 )
13. 8 X 4/5 + 8 X 11/5
14. 31 X 5/6 - 5/6
15. 9/7 - ( 2/7 — 10/21 )
16. 5/9 X 18 - 14 X 2/7