21分数乘除法简便运算100题有答案.docx
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21分数乘除法简便运算100题有答案.docx
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21分数乘除法简便运算100题有答案
分数乘除法简便运算100题
/厂、2
3
5
3
6
7
6
2
(5)2
x4
+27x
4
(6)13
x5-
13x
5
(7)
7
5
33
43
3
12x
6-
12x
6
(一)一+一
x7+一
x7
(9)
37x
3
35
6
(10)25
x24
15
3
10
3
3
7
7
(11)
x
21
+
4
x
21
4"
4
(12)10
x101-
10
3)
^1
8一9
X
8一9
-
8一9
X
8一9
3_5
+
9
9
X
3_5
4
T—
(15)(7+8)x7x9
(16)34x25
(17)
34
36x35
8)
T—
X
5-9
-
5-6
(19)
(21)
10
(22)
(20)
2
325
5
35—5
7
3747
(23)7
8
78
(25)
3
20-
5
6
7
1
2
1
(24)9
9
9
9
(26)5
5
4
5
9
12
9
12
3
(27)8
(28)63
37
62
(29)
(30)
29
x(15
29
31
(31)
15
(32)258
11
(33)
54x
(34)
12
18
24
72
(35)
11
0.375
11
19
25
21
25
19
5
3
1
11
5
3
131
(37)
6
8
48
(38)
12
6
4
2424
7
11
2
5
4
3
265
578—157
(39)
9
5
9
11
(40)
3
4
3
3
5
5
5
111
-8
8
—
—
—
—_
(41)
8
8
(42)
7
9
12
7912
5
3
5
33
—
—
4424
0.6
(43)
3
5
3
(44)6.8
x
+1
x3.2
(45)
4
101x4
5
5
25
(46)
5
+5x
15
(47)8
_8
-8
8
8
15
(48)
1
x6+
2x6
(49)
(90+—
)x
丄
3
7
3
7
88
89
7
(36)
4
3
(50)
3+二
(51)
AX
9+
5
亠10
•
(52)
18X
(4+-)
15
16
27
9
96
(53)
22
2X7+2
X5
(54)
(丄-
丄)X
(24—-)
3
3
6
12
5
(55)
(5X
4+
4)
亠4
.
(56)
1r[
(-+-
)X1]
7
7
7
7
5
35
13
(57)
33X
7+土
X3?
(58)3331
X3
8
11
11
8
3
(61)
(32X
1+17)r2
(62)(25+3
4
)r
丄+1
4
12
4
4
(63)
18X
9
+-1
X9+
9
25
16
25
16
16
5
4
3
51
1
3
16
63(-
)
(65)
[(
)
]
(64)
9
21
7
82
3
4
23
26x2
413
13
X39+X25+(95)44
423117
(96)1X(2三-)+15--
17341221
(97)2000-2000-2000
2001
199319941
(98)199319921994
322
(99)3X25+37.9X6
555
2255
(100)(9彳+7)*(3+3)
7979
分数乘除法简便运算100题答案
(3)
(1)(9+27)%3%9=31
(7-
(2)
3
3
6
(8
-8
)%
15=0
(4)
5
5
5
1
6%9+
9%
6=
6
7
62
(6)13
%5-
13%5
11136
3一4
X
+
3-4
X
2一9
5
T—
X
5-12
-
6
X
3
3
4
3
3
(8)8+
8
%7
+_
8
%7
3一35
X
37
=5
(⑵
153
21%4
103
21%4-
3_!
4=7
(10)
6
25
%
24
6
25
%
(25-1)
19
25
7
7
(12)
%
10
101-10=70
^1
00-9
X
00-9
88
9x9=0
48
(16)(7+9)x7x9=92
Iiz
(16)3^x25=95
(17)
34
36X35
5
(18)(6-
18
气=1
=(35+1)
34
35
=34
34
35
(19)26彳x
2
(20)32
5
=(25+3)x1
30+12)
27
21
)
10
2
5
=1
7
23)
3
7
4
7
7
8=
8
7
25:
)
3
5
20
5
6
:
12丄
2
22
1
7
9
9
9
9=5
5
5
4
5=
9
12
9
12
37=3737
6262
2
26)
3
(27)8
3
x3=0
(28)
63
(29)
(30)29x(15x詈)
30
31
(32)
(33)54x(8-
6)=3
3
(32)254x4=103
11Z_5丄
(34)121824了亠低
(36)
3
5
0.3752—
3-
8
11
11
3=0
5
3
1
(38)6
8
48
=58
(38)
5
19
21
4
19
(36)
7
25
25
=19
5
7
11
5
3
13
1
12
6
4
24
24
=7
7
11
2
5
(39)9
~5
9
11=5
(40)
11
3
3
8
8
(42)8
8
=64
(42)
33
5
3
-4424
5
0.6
(43)
3
5
3
=60
3
43=750
5
5
5
111
7
9
12
7912=5
434
265578157-
(45)6.8乂+-X3.2=2
55
55
(46)+X15=10(47)8
88
(48)1X6+-X6=-(49
37377
(45)
4
101V
=16上
25
25
8
1
*8=1—
15
15
1、1
1
)(90+
)X=
=1—
8889
88
(50)-X3+5X--
7887=7
(51)
8X5+5
*巴
1
151627
9=
:
3
(53)
22
2X7+2X5
=8
33
/14
=1—
15
(55)
(5x4+4)
亠4
12
777
7
=7
(57)
33X7+A
X33
=33
81111
8
8
(59)
5_5
9
5
91212
5=
9
(52)
18X
4+-)=23
9
6
(54)
(1-
丄
)X(24--)
6
12
5
(56)5r(f+i)X113]=3
1
(58)333-X3=1000
(62)(32X1+17)-§
412=60
(60)
25
2
5
34
5
6=1
(62)
(25+-
)
1
*—+
1丄
4
4
4=1034
(63)
18X
9
+-
上X旦+1
9
25
16
251616=
=8
63(-
4
3
)=20
(64)
9
21
7
(67)
(21X
3+4
1
X21)X1=
_21
7
7
4
4
(65)
吟(23);]理=o
91
(67)(99+局“9=叫
(69)兰-[
(4
+
2)
X卩]=
7
15
5
3
11
10
56
X--
9
亠9
=1
(70)651052
(69)(5+-)X30=49
65
111
(71)-X58+—X41+—
888=12.5
(73)4X4X5—
574
1
2=14
(73)
4_
X
5
+2亠3=4
553
45
(74)十(-
58
3
(75)5
153-0.6X53=60
723
+10
20
1
(77)1
1310
【2飞X
)]=32
(78)(
15X11
=67
(79)
37
39
(80)
4444
46X±=44
4545
(81)2008
2006
2007
=2006遊
2007
(82)
7
12
5
22
(83)
9
10
13
X仃
_9
+10
49
X=X1710
(84)
36x37=
28
37
(85)
11
13
11
13
13
X33
20
33
(86)
25X01丄
25
=28
(87)-
7
(88)
_5
=9
(89)17X
_9
16
(91)X37
45
=(1-—)X3745
(92)2004X67
2003
(2003+1)>
/67
2003
=1X37-—X37
45
=2003
67
2003
2003
8
=36-
45
1
(93)73X
=67
67
2003
15
8
16、
1
(72+
)
X-
15
8
1
16
1
72X
+
X
8
15
8
1
=9?
15
(94)166—-41
20
=(164+41)X丄
2041
=164X—+
1
=2000-
2000
2001
2000
20
1X39+(95)4
—X25+26x2
4
4
13
3
一3
326
=X
13+-
X25+
X—
4
4
413
=—X
(13+25+2
)
4
3=X40
4
=30
4
/C2
3、
“1
17
(96)1-
〈(2—-
)
+15—
17
3
4
12
21
=21
11
“1
21
X1—+
15一
-X—
17
12
12
17
=21
宀11
1、
X(1—
+15
)
17
12
12
=21
(97)2000-2000-2000
2001
2001
=2000
2001
20002002
=2001
2002
199319941
(98)199319921994
=(19921)19941
199319921994
=199219941993
199319921994
=1
3
2
2
(99)3
X25-
+37.9X
6-
5
5
5
=3
3
2
X25-
2
+(25-
+12.5)X
6-
5
5
5
5
3
小2
小2
小2…
八2
=3
X25-
+25X
6+12.5
X6—
5
5
5
5
5
=
(3.6+6.4
)X25.4+12.5X8X0.8
=254+80
=334
2255
(100)(9三+7)*(兰+工)
7979
=(65+65)*()
7979
1111
=[65X(丄+丄)]-[5X(丄+丄)]
7979
=65-5
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