第一类：加
65+73+135
129+235+171+165 6+7+8+102+103+104
第二类：减
400-256-44
258-42-16
344-（144+37） 357+288+143
272+68+28
17+145+23+35 999+99+9+3
9998+3+99+998+3+9
517-53-47 284-159-41
545-167-145 478-47-178
236-（177+36）
1
第三类：乘
45x 4x 5
23 x 5X 2
25X 9x 4
8x（ 125x 13） 250x 125）x（ 4x 8） 88x 125
72x 125 25x 4x 88x 125
第四类：乘
12+50）x 40
18x 125
99x 78
x 64x 25 125x（ 40-4）
25x 44 2
42x 125x 8x 5
76x 103
42x 25 99x 9
125第五类：乘
45 X 37+37X 55 28X 21+28X 79
17X 23-23X 7
38X 46+64X 38 99X 32+32 46+46X 59
167X2+167X3+167X5
39X 8+6X 39-39X 4
28X 225-2X 225-6X 225 （42+25）X 125+（18+15）125
23X 2X 4+25X 4X 2+27X 1 X 8+25X 8X 1 99X 22+33X 34
3
X
第六类：除
4
800—5 — 8 240— 5— 12
420— 35 2400— 25 7800— 12
第七类：加减
92+99
197+102
354-108
405-99 127-98 323+189-123
248+86-48 672-36+64 ( 6467-832)+( 1832-1467)
1530+( 592-530)-192 (2+4+6+ ……+98+100)-(1+3+5+ +97+99)
第八类：乘除
960 X 46 — 48
99000— 121 X 11
3702 X 38 — 1234
5
640+( 16-4)
第九类：加减乘除 ( 98+147)+ 49
1736+ 28+1064+ 28
(37+15)X 85+1360 42x 125X 8X 5
(12+50)X 40
18x 125
1000+( 125-4)
230-23)+ 23
( 250-25)+ 25
125x(860+240+12) 700+612+12x4
2005x 20062006-2006x 20052005
25x 4x 88x 125
125x( 40-4) 86x 103
25x 44 42x 25
6
99 x 9
99 x 78 45x 38+38x 55
28x 21+28x 79 37x 23-23x 7 38x 46+64x 38
99x 32+32 46+46x 59 167x 2+167x 3+167x 5
39x 8+6x 39-39x 4 28x 225-2x 225-6x 225
42+25）x 125+（18+15）x 125 65+73+135
357+288+143
272+68+28 129+235+171+165 17+145+23+35
7
400-256-44 517-53-47 284-159-41 258-42-16
545-167-145 478-47-178
344-（144+37）
236- （
177+36） 25x 9X 4
88 X 125
42 x 125x 8x 5
125X（ 40-4）
45X 4X
23 X 5X 2
5
8X
250X 125）X（（125X13）
8）
72X 125
125X 64X 25
25X 4X 88X 12+50）125
40
76X 103 18X 125
8
4X X
25 X 44
42X25
99X9 99X78
45X37+37X55 28X21+28X79
17X23-23 X7
38X46+64X38 99X32+32 46+46X59
167X2+167X3+167X5 39X8+6X39-39X4
360^4^9
250七吃 600勻2为 800吒弋
420 - 35
117+392+608
88X 27＋ 27X 12
9
87 X 53+ 87 X 47 7X 75- 7X25 234— 66— 34
528—53— 47
38X 99+ 38 108X 75 25X 7X 4 125X 88
435-（135+ 189）
147+ 147X 99 35X 201 2X 125X 8X 6 25X 48
30+ 255+ 70 10
167X 25+ 32X 25+ 25
25X（ 4+ 8）
75X 98
25X 32X 125
282+ 41+ 159
88 X 27 + 27 X 12 6.3 - 1.8 125X 64+125X 36
64 X 199 + 64 528—53—47 158 + 395 + 105
4800宁25
(13X 8X 5X 6)-( 4X 5X 6)
2.1 X 99 + 2.1
0.18 + 4.26 — 0.18 + 4.26
8100-4-75
16800- 120
1248- 24
3150- 15 (10000-1000-100-10)+ 10
138 + 293+ 62 + 107 99+999+9999+99999
66.86 — 8.66 — 1.34
11
8811-89
25 X 6.8 X 0.04
645-180-245
101 X 56
4 X 60X 50X 8
63.4 - 2.5 - 0.4
36＋64－36＋64
10
0.432 － 2.568
98 X 199
355+260+140+245
102X 2X 125
99
125X 32 25X 46
99X 26 382X 101-382
930 - 0.6 -5
1022－478－
422
2357－183－317－672－36＋357 64
500－257－ 34－143
755-287+87
12
1814－378－422 89 x 99+ 89
3999+498
88x 225+ 225x 12
698－291－
9
568－（ 68+ 178）
382+ 165+ 35－82
155+ 256+ 45－ 98
759-126-259 216+89+11
75x 99+2x 75
1050T5 叼
7200^24^30
219 x99
58 x101
76 x102 78x46+78x54
169x123—23x169
129x101 —129
56x51+56x48+56 125x 25x 32 24x 25
13
514+189—214 732—254—332 56 x 25 x 4X 125
24 X 74+26X 24
228+(72+189) 1 09+( 29 1 — 1 76)
14
(375+1034)+(966+125) (2130+783+270)+1017
参考答案 第一类：加
6+7+8+102+103+104 272+68+28
357+288+143 =272+28+68
65+73+135
=357+143+288 =368 =65+135+73
=788
999+99+9+3 =273
17+145+23+35
129+235+171+165 =999+1+(99+1)+(9+1) =17+23+(145+35) =129+171+(235+165) =1110=220 =700 9998+3+99+998+3+9
=102+8+(7+103)+(6+104) =9998+2+(99+1)+(998+1)+(9+1) =330 =11110 第二类：减 =8X 125X 9
=125X 8X (25 X 8) =200000
517-53-47
=9000
400-256-44 =400-(256+44) =100
258-42-16 =258-(42+16) =200
344-( 1 44+37) =244-144-37 =63
=42X 5X (125X 8) = 210000
284-159-41 = 284-(156+41) =84
478-47-178 =478-178-47 =233
=517-(53+47) =417
545-167-145 =545-145-167 =233
236-( 1 77+36) =236-36-177 =23
第三类：乘
45X 4X 5 =45X (4X 5) =90
8X(125X13) =8X 125X 13 =13000 72X 125
23 X 5X 2 =23X (5X 2) =230
25X 9X 4 =25X 4X 9 =900
(250X125)X( 4X 8) =125X 8X (250X 4)
=1000000 125X 64 X 25
88X 125 =8X125X 11 =11000
42X 125X 8X 5
25X 4X 88X 125 =100X (8X 125) X 11 =1100000
第四类：乘
(12+50 )X 40
=12X 40+50X 40 =880 18X 125 =(10+8)X 125
=10X 125+8X 125=2250 99X 78 =(100-1) X 78
=100X 78-1 X 78 =7722
125X(40-4) =125X40-125X 4 =5400
25X 44 =25X 4X 11 =110
76X 103 =76 X (100+3)
=76X 1 00+76 X 3 =7828 42X 25
99X 9
=2X 25X 21 =1050
15
第五类：1530+(592-530) 乘 =1530-530+(592-192) 45 X 37+37 X 55 =1400
=37 X +(45+55) =3700
38X 46+64X 38
=38X (46+64) =38X 110
+97+99)
28X 21+28X 79 =28X (21+79) =2800
99X 32+32 =32X(99+1) =3200
17X23-23X 7 =23X (17-7) =230
46+46X 59 = 46X( 59+1 ) =2760
=38X (100+10) =38X 100+38X 10
=4180
167X 2+167X 3+167X5 =167X( 2+3+5) =1670
39X 8+6X 39-39X 4 =39X( 8+6-4 ) =390
28X 225-2X 225-6X 225 =225X( 28-2-6) =4500
(42+25)X 125+(18+15)X =125X(42+18+25+15)
=12500
99X 22+33X 34 =33X( 66+34) =3300
125
23X 2X 4+25X 4X 2+27X 1 X 8+25X 8X 1 =8X( 23+25+27 ) =600
第六类：除
360 - 4-9 =360 -( 4 X 9) =10 800 - 5 - 8 =800 - 8- 5 =20 =2 420 - 35 =420 - 7- 5 =12 92+99 =92+(100-1) =92+100-1 =191 405-99 =405-(100-1) = 405-100+1 =306 248+86-48 =248-48+86 = 286
=96
250 - 5 - 2 =250 -( 5X =25 480 - 5-48 =480
2)
600- 12-5 =600 - (12 X 5) =10 240 - 5 - 12 =240
- 48 - 5
=4 2400 - 25
- 12-5
7800- 12 =7800
=2400
- 5- 5
=650
- 6 - 2
第七类：加减
197+102 =197+(100+2) =197+100+2 =299 127-98 =127-(100-2) =127-100+2 =29 672-36+64 =672-(36+64) =572 -192
354-108 =354-(100+8) =354-100-8 =246
323+189-123 =323-123+189 =389
(6467-832)+ (1832-1467)
=6467-1467+(1832-832) =6000
(2+4+6+ ....... +98+100) - (1+3+5+•…
=(2-1)+(4-3)+ …+ (98-97) + (100-99)
16
=1+1+...+1+1 =50
-192
17
第八类：乘除
960 X 46 - 48 =960 - 48 X 46 =920
640+( 16- 4) =640 +6 X =160
99000+121X 11 =99000+ (121+ 11) =9000
1000+( 125+ 4) =1000+ 125X4 =32
3702 X 38+ 1234 = 1 234 X3 X38 +1 234 =114
第九类：加减乘除 ( 98+147 )+ 49
=98+ 49+147+ 49 =5
( 230-23 )+ 23
=230+ 23-23 + 23 =9
( 250-25)+ 25
=250+ 25-25+ 25 =9
700+612+ 12 X 4 =700+612 +3 +4
1736+ 28+1064+ 28 =(1736+1064) + 28 =100
125X( 860+240+12) =125 X 880 =125X 8X 110 =110000
X4 =700+204 =904
37+15)X 85+1360 =50 X85+2 X85+1 360
2005X 20062006-2006X 20052005 =2005X 2006X 10001-2006X 2005X 10001 =0
25X 4X 88X 125 =100X 11X (8X 125) =1100000 125X( 40-4) =125X 40-125X 4 =4500
25 X 44 =25X 4X 11 =1100
99X 78 =(100-1) X 78 =78X 100-78 =7722 37X 23-23 X 7 =(37-7) X 23 =690 46+46 X 59 =(59+1) X 59 =3540
38X 46+64X 38 =(46+64) X 38 =3800 42X 25 =2X 25 X 21 =1050 45X 38+38 X 55 =(45+55) X 38 =3800
86X 103 =86X (100+3) =86X100+86X 3 =8858
=4250+170+1360 =5610+170=5780 42X 125X 8X 5 =125X 8X (42X 5) =210000
( 12+50 )X 40
=12X 40+50X 40 =680 18X 125 =(10+8) X 125 =125X 10+125X 8 =2250 99X 9 =(100-1) X 9 =100X 9-9 =91
28X 21+28X 79 =(21+79) X 79 =7900
99X 32+32 =(99+1) X 32 =3200
167X 2+167X 3+167 X 5 =(2+3+5) X 167 =1670
39X 8+6X 39-39X 4 28X 225-2 X 225-6 X 225 =(8+6-4) X 39 =(28-2-6) X 225 =390 =2500
42+25) X 125+(18+15)X 125
65+73+135
357+288+143
18
=[(42+18)+(25+15)] =12500 272+68+28 =272+28+68 =368 400-256-44 =400-(256+44) =100 545-167-145 =545-145-167 =233
236-(177+36) =236-36-177 =23
25X 9X 4 =25 X 4 X 9 =900 88X 125 =11X (8X125) =11000
42X 125X 8X 5 =42X 5X (8X 125) =210000 125X( 40-4) =125X 40-125X4 =4500
X125
=65+135+73 =357+143+288
=273
129+235+171+165 =129+171+(235+165) =700
517-53-47 =517-(53+47) =417 478-47-178 =478-178-47 =253 45X 4X 5 =45X (4X 5) =90
=788
17+145+23+35 =17+23+(145+35)
258-42-16
=220 284-159-41 =284-(159+41) =84
344-(144+37) =344-144-37 =163 23 X 5X 2 =23X (5X 2) =230
8X( 125X 13) =8X 125X 13 =13000 72X 125 =9X (8X 125)
(250X125)X(4X8) =250X 4X (125X 8)
=1000000 125X 64X 25 =125X 8X (8X 25)
=9000 =100000
25X4X 88X 125 (12+50)X 40
=100X 11X (8X 125) =1100000 76X 103 =76X (100+3) =7828
=12X 40+50X 40 =2480 18X 125
=(10+8) X 125 =10X 125+8X 125 =2250
99X78 =(100-1) X 78 =7800-78 =7722
17 X23-23 X7 =(17-7) X 23 =230
46+46 X59 =(59+1) X 46 =2760
=76X 100+3X 76
25X 44 =25X (40+4) =25X 40+25X 4 =1100
45 X37+37 X55 =(45+55) X 37 =3700
38 X46+64 X38 =(46+64) X 38 =110X 38 =(10+100) X 38 =38X 10+38X 100
42X25 =(40+2) X 25 =40X 25+2X 25 =1050
99X9 =(100-1) X 9 =9X 100-9 =891
28X21+28X79 =(21+79) X 79 =7900 99X32+32 =(99+1) X 32 =3200
=4180
167X2+167X3+167X5 39 =(2+3+5) X 167 =1670 250弋吃
600 W2
39 X8+6 X39-X
=(8+6-4) X 39 =390
360 -4 弋 =360 44 >9) =10 480 - 5 - 48
800为充
弋
19
=250 说5 X 2) =25
=600 说12 X 5) =800 七为
=10 =20 =2420 - 35 =420 - 7 - 5 =12
117+392+608 =1117
=8700
7X 75－ 7X 25 =(75-25) X 7
88X 27＋27X 12 =2700 =350
234— 66— 34 =234-34-66 =134
240 - 5 - 12 =240 - 12-5 =4
=117+(392+608) =(88+12) X 27
87X 53＋ 87X 47
=(53+47) X 87
528—53—47 =528-(53+47) =428 38X 99＋ 38 =(99+1) X 38 =3800 108X 75 =(100+8) X 75 =8100 25X 7X 4 =25X 4X 7 =700 125X 88 =25X 8X 11 =11000 420- 35- 2 =420- (35X 2) =60
88X 27＋27X 12 =(88+12) X 27 =2700 64X 199＋ 64 =64X (199+1) =12800 4800- 25 =48X100-25 =48X4 =192
435－( 135＋189) =435-135-189 =111
147＋147X 99 =(99+1) X 147 =14700 35X 201 =35X (200+1) =7035
2X 125X 8X 6 =2X 6X(125X 8) =12000 25X 48 =25X 8X 6 =600
30＋255＋70 =30+70+255 =355
167X 25＋32X 25＋ 25 =(167+32+1) X25 =5000
25X( 4＋8) =25X 4+8X 25 =300
75X 98 =75X (100-2) =7350
25X 32X 125 =25X 4X (8X 125) =100000
3500- 4- 25 =3500- (4X 25) =35
282＋41＋159 =282+(41+159)
=482
6.3 - 1.8 =6.3- 0.9- 2 =3.5 528—53—47 =528-(53+47) =428
125X 64+125X 36 =(64+36) X 125
=12500 158＋395＋105 =158+(395+105) =658
2.1 X 99 ＋ 2. =2.1X (99+1) =210
( 13X 8X 5X 6)-( 4X 5X 6) =13X (8- 4) X (5- 5) X (6- 6)
=26
16800 - 120
=(81x100 )+4-(25x3 ) =81- 3x(100- 4- 25)
=(12000+4800)+ 120 =140
=4.26+4.26+(0.18-0.18) =8.52
20
0.18 ＋ 4.26 －0.18 ＋4.26 8100- 4-75
1248 - 24 =1248勻2吃 =52
3150- 15 =3150弋七 =210
(10000-1000-100-10)- 10
=10000 W0-1000 40-100 40-10 40 =1000-(100+10+1)
138＋293＋62＋107 =889
99+999+9999+99999
=138+62+(293+107) =500
66.86－8.66－1.34 =66.88-(8.66+1.34) =56.88
25 X 6.8 X 0.04 =25X 0.04X 6.8 =6.8
645-180-245 =645-245-180 =220 101 X 56 =(100+1) X 56 =5656 4X 60X 50X 8 =4X 50X (60X 8) =96000 63.4 - 2.5 - 0.4 =63.4 - (2.5 X 0.4) =63.4
36＋ 64－ 36＋ 64 =(36-36)+(64+64) =128 1814－378－422 =1814-(378+422) =1014 88X 225＋ 225X 12 =(88+12) X 225 =22500
382＋165＋35－82 =382-82+(165+35) =500
759-126-259 =759-259-126 =374
= ( 99+1 ) +(999+1) + (9999+1) +(99999+1)-4
=111096
8811 - 89
10 － 0.432 － 2.568
98X 199 =(8900-89) 8密=10-(0.432+2.568) =98X(200-1) =99 =7 =19502 355+260+140+245 102X 99 2X 125 =355+245+(260+140) =99X (100+2) =2X5X25 =1000
=10098 =250
125X 32 25X 46
=125X 8X 4 =25X (40+6)
=4000 1150
99X 26 382X 101-382
=(100-1) X 26 =382X (101-1) =2574 =38200
930 - 0.6 - 5 1022－478－422 =930 - (0.6 X 5) =1022-(478+422) =310
=122
2357－183－317－357 672－36＋64
=2357-357-(183+317) =672-36-36+36+64 =(672-=1500
72)+(36+64) 500－257－34－143 =700 =500-(257+34)-143 755-287+87 =57
=755-(287-87) 89X 99＋ 89 =555
=(99+1) X 89 3999+498 =(4000-1)+(500-=8900 2) =4000+500-1-2 =4497 698－291－9 568－( 68＋ 178) =568-68-=698-(291+9) 178 =398
=322
155＋256＋45－98 =(155+45)+256-(100-2) =200+256-100+2 =358
216+89+11 75X 99+2X 75 =216+(89+11) =316
=75X (99+2) =75X 100+75X 1 =7575
21
1050 W5勻 =1050十(15X 7) =10
7200 £4 0 =7200 £24 X 30) =10
七
219 99 =219 (100-1) =219 100-219 1 =21681
169 123—23 169 =(123-23) 169
58 t01 =58 X (100+1) 76 102 78 X46+78 >54 =76
(100+2) =(46+54) X 78
=5858
X=7752 =7800
=16900 129 XI01 — 129
56 X51+56 X48+56 125 25 32
24 25
=(101-1) X 129 =(51+48+1) X 56
=125 8 (25 4) =8 25 =12900
=5600
=100000 = 300
514+189—214
732—254—332
56 25 4 125
=514-214+189 =732-332-254 =4 25 (8 125)
7
=489
=146
=700000
24 X 73+26 X
228+(72+189) 109+(291—176) 24
=(74+26) X 24
=228+72+189
=109+291-176
=2400 =489
=324
(375+1034)+(966+125) (2130+783+270)+1017
=(375+125)+(1034+966) =2130+270+(783+1017)
=2500 =4200
22
3
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