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题目内容
3.2-3.2÷5+5.74=
A.
6.5
B.
8.3
C.
1.875
D.
1.86
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1.4×0.4=
3.3÷3=
1.2÷0.3=
0.56÷8=
2.5×0.4=
1.5×2=
0.7×7=
7.3+0.3=
1.23×3=
0.53-0.3=
1.8×0.5=
0.9×0.01=
0.23×3=
1.6÷0.04=
2-1.2=
7.8÷6=
8.4÷0.21=
8.4÷0.7=
1.23×3=
5.6+3.6=
9-2.35=
0.56÷8=
7.3+2.7=
4.8÷1.2=
5.6÷0.4=
4.5÷0.9=
8.1×2=
90÷3=
7.2÷0.9=
1.23+3=
5.6+1.23=
4.5×2=
5.6÷1.4=
6.6÷1.1=
2.1÷3=
0.6×0.5=
3.23×2=
1.8÷3=
7.2÷6=
12.5÷0.1=
0.32÷0.8=
1.6+3.7=
0.45×0.2=
4.8÷0.08=
0.36÷1.8=
0.4×0.5=
8.4+5.6=
8.4÷2.1=
1.8×0.4=
0.01×8=
7.31×100=
0.09×6=
0.8×0.6=
3+2.3=
1.25×8=
3÷5=
2.3+2.3=
6.23+3.6=
9.3÷3=
4.8÷0.8=
7.5-4.5=
5.7+4.3=
0.75÷15=
1÷0.25=
1.2×60=
6÷0.2=
0.21×4=
0.25×4×9=
2.33×1.2=
0.62÷0.62-1=
5+3.2÷0.8=
7.5÷2.5×0=
3.9×0.01=
0.001+10.099=
3-0.98=
6×0.25=
0.63÷0.9=
8.95÷0.895=
3.5×0.4=
2.5×0.4=
2.3×0.2=
2.1÷0.3=
7.1×0.4=
4.5÷0.15=
1-0.07=
0.42÷0.7=
12.4÷4=
2.5+1.5=
5.9×0.2=
0.48÷0.8=
0.25×1.3×4=
20÷0.01=
9÷0.01=
5.5÷1.1=
4.79+15.81=
0.3÷0.03=
0.2×0.1=
3.6+6.4=
0.56÷0.28=
1.2×0.3=
6.7-5.6=
7.25÷0.5=
4.2÷0.21=
4.3×0=
0.15÷0.5=
3.5×4=
5.32-5.3=
1.25×3.4×8=
9.6÷3.2=
3.6+2.4=
4.3-2.7+5.7=
7.2-5.6=
1.8÷0.9=
8.2×0.5=
5.6÷0.4=
8.5÷5=
5.6×0.5=
9.8÷0.2=
3.56×0.2=
3.4+1.5+4.6=
3.4×0.04=
6.12+3.48=
6÷0.12=
7.6÷4=
3.4×0.5=
5.2-3.2-1.8=
6-3.8=
7.5÷3=
3.5+5.4=
3×2.5=
3.5+6.5=
7-6.23=
8÷0.4=
0.25×2.5=
7.5÷0.5=
0.89-0.48=
3.5×0.8=
5.9-(3.2+0.9)=
1.
(1)438+203
(2)256+199
(3)416-302
(4)325-198
(5)278+498
(6)3.6+2.7+6.4+7.3
(7)
4
9
+
5
6
+
5
9
+
2
1
6
(8)1.3+4.25+3.7+3
(9)1874-324-476
(10)5-1.4-1.6
(11)30-8.12-4.13-7.75
(12)
7
8
-
4
5
+
1
8
(13)4.3-2.45+5.7-6.55
(14)125×48
(15)25×32
(16)35×1.4
(17)1.25×88
(18)0.25×444
(19)32×0.25×12.5
(20)25×80×0.04×125
(21)1.9×4×0.5
(22)25×1.25×4×0.8
(23)(1.6+1.6+1.6+1.6)×2.5
(24)(0.7+0.7…+0.7)×12.5(80个0.7相加)
(24)9.9×8.6+8.6
(25)99×5.4
(26)4.8×1.01
(27)95×101-95
(28)95×102-190
(29)95.6×18+0.4×18
(30)(
1
3
-
1
6
+
1
4
)×12
(31)(
1
3
+
1
8
-
1
24
)÷
1
24
(32)24×(
1
3
+
1
8
-
1
24
)
(33)24÷(
1
3
+
1
8
-
1
24
)
(34)1.25×3.6+1.25×
3
2
5
+
1
1
4
(35)3.3×
3
4
+0.75×
5
7
10
+75%
(36)
2
1
2
×6.6+7.5×
6
3
5
(37)9.56×180-95.6×8
(38)4.8×37+47×6.3
(39)9.5×8.8+0.12×95
(40)
19
20
×21
(41)
7
30
×33
(42)
2
45
÷
1
46
(43)
2
45
÷
1
48
(44)
2
45
÷42
(45)6×0.75+5×
3
4
-3÷4
(46)5.4÷1.2÷5
(47)270÷18
(48)120÷(1.2×4)
(49)73÷0.8÷12.5
(50)16÷2.5
(51)48÷1.25
(52)
3
7
-(
1
2
-
3
7
)+
1
2
(53)84-(54-16)
(54)84-(54+16)
(55)9999×7778+3333×6666
(56)3.6×31.4+43.9×6.4
(57)(
3
4
+
5
6
)×
12
5
(58)
7
9
×
13
14
+
2
9
÷
14
13
(59)
23
20
-
1
3
-
2
3
(60)
6
11
×
7
8
-
6
8
×
5
11
(61)
1
2
×
1
4
÷
1
2
×
1
4
(62)
25
17
-
1
3
×
9
8
-
5
8
(63)
8
9
×[
3
7
÷(
2
3
+
1
7
)]
(64)(0.9+5)×3+2.3
(65)56×
1
57
(66)
3
4
+
1
4
÷
3
4
+
1
4
(67)(
3
4
+
1
4
)÷(
3
4
+
1
4
)
(68)
7
15
÷(
7
30
-
1
15
)
(69)(
7
30
-
1
15
)÷
7
15
(70)7.2÷(5-0.75-0.25)
(71)6.4+3.6÷0.5+4.5
(72)(6.4+3.6)÷0.5+4.5
(73)495÷55+495÷45
(74)8÷0.4+8÷1.6
(75)0.9+99×0.9
(76)5.28-(1.62+2.28)
(77)
5
9
-
5
9
+
4
9
(78)4×(
3
8
+)
(79)
5
9
+
3
11
++
(80)2-(
1
2
+
1
25
)-
23
50
(81)
7
18
×
1
4
+
3
4
×
7
18
(82)
7
10
×
11
14
+
11
14
×
3
10
(83)
7
8
×9+
7
8
(84)(5+
5
16
)×
4
5
(85)(
1
6
+
1
8
)×24
(86)(20+
4
7
)×
7
10
(87)
1
13
×39×
8
21
(88)
7
3
×(
3
7
+
3
28
)
(89)(
1
4
-
1
6
)×12
(90)
40
13
×(26×
3
40
)
(91)
1
7
+
7
9
+
6
7
+
2
9
(92)17×
3
8
-
3
8
(93)(
8
5
+
8
3
)×
5
8
(94)(
13
24
+
13
16
)÷
13
16
(95)(
3
8
+
3
11
)÷3
(96)(
1
27
-
1
36
)÷
1
9
(97)
3
7
÷
7
11
+
4
7
÷
7
11
(98)
4
5
×(10+
5
6
)
(99)(21+
7
15
)÷
7
5
(100)
7
13
×
3
4
+×
6
13
(101)
5
2
÷
4
17
+
3
2
÷
4
17
(102)(
5
18
-
5
24
)÷
5
6
(103)
2
3
×
7
3
+
4
5
+
(104)
25
17
_
1
3
×
9
8
-
5
8
(105)
12
7
-(
1
3
÷
7
15
+
4
13
)
(106)
5
7
+
9
8
×
5
9
+
3
8
(107)1-
5
8
÷
25
28
-
3
10
(108)
1
4
×
3
7
+÷4
(109)5-(4+
6
13
)
(110)1125-997
(111)7.46-0.83-2.17
(112)12.85-1.17-8.83+1.15
(113)4.5×102
(114)0.4×6.3×25
(115)(4.9+4.9+…+4.9)×2.5(16个4.9相加)
(116)7.5×199
(117)(
1
9
+
1
12
)×36
(118)1.2×5.7-1.2+5.3×1.2
(119)0.825×102-82.5
(120)46×
2
45
(121)560÷16÷5
(122)3÷2.5
(123)84+(54-16)
(124)
3
11
+
5
12
+
8
11
+
7
12
(125)
12
7
-(
1
3
÷
7
15
+
4
13
)
(126)3×(
1
12
+
2
15
)+
3
4
(127)7.2÷(5-0.75+0.25)
(128)725÷25+275÷25
(129)
1
2
×
1
4
×
2
3
(130)
7
16
×45-
7
16
÷
1
45
(131)48×(
5
6
-
3
8
)
(132)
12
13
×
4
5
+
1
3
×
1
2
(133)(32+
4
7
)÷4
(134)
1
3
÷
3
8
÷
8
9
(135)46×
2
45
(136)
3
4
×
1
9
+
1
4
÷9
4.7+2.3=
4.5×2=
6.9-2.5=
7.2×0.8=
6×3.4=
0.62-0.32=
1.4×0.5=
0.75×100=
0.02×0.5=
3.6÷0.3=
6.3÷7=
5.6÷100=
0.75÷0.25=
0.125×8=
4.8÷0.3=
0.96÷2=
0.56÷28=
0.36÷0.4=
0.64÷0.8=
0.72÷3.6=
3.6÷24=
0.8×1.1=
7.2+12.8=
46.7-3.8=
12.8÷4=
5.2÷13=
12.5÷5=
1.64÷41=
10÷20=
24÷15=
8.65×10=
0.35×0.6=
3.08×0.01=
4.95×1000=
6.9×0.1=
0.4×0.5=
2.4÷0.8=
10.8÷9=
9.6÷0.8=
0.108÷2=
4.95÷0.9=
9.65÷0.1=
0.325×100=
2.5×8=
0.56÷0.7=
0.125×4=
3.28×0.1=
3.9÷0.13=
7.2×0.1=
0.01×0.1=
0.25×0.4=
1.6÷0.8=
1÷2.5=
1.25×0.8=
3.2÷0.04=
0÷1.7=
0.22×102=
9.6÷0.8=
5×0.24=
4.5-0.05=
3.9÷0.13
16.5÷0.5=
5×0.12=
24×0.5=
4.8×0.5=
2.8+4.2=
0.84÷2.1=
5÷0.25=
7.8÷0.01=
5.4÷0.6=
3.2÷5=
7×0.62=
0.56÷0.8=
7.4-2.8=
0.18÷0.2=
0.16÷8=
4.5×0.02=
8+7.2=
1.2×30=
0.012×0.2=
7.3×0.3=
9÷6=
3.6÷0.12=
7.8÷0.6=
2÷5=
4.5+5=
0.3÷0.6=
0.96÷0.2=
10.5×0.4=
7.3+0.27=
8×0.125=
0.54÷0.6=
0.61+0.39=
0.56÷28=
10÷20=
4.08÷0.4=
11-9.4=
0.8×0.11=
0.72+12.8=
5.6÷0.01=
2.3×100=
0.75×100=
0.108÷2=
10.8÷9=
0.7÷0.8=
16-5.07=
4.2×0.4=
0.72×6=
12÷0.5=
5.2×0.4=
12.2÷0.2=
5.6÷100=
0.41+3.7=
0.02×0.5=
7.2-0.8=
1.4×0.5=
84÷0.21=
0.75÷0.25=
2.5×16=
0.108÷2=
1.75+32.5=
16-5.07=
5.2÷13=
1.64÷41=
1.02×0.2=
0.26×0.3=
8.4×0.02=
1.29×6=
0.8×0.05=
12.6÷0.03=
8.71÷0.1=
21÷0.21=
0.8×0.13=
0.34÷17=
8.08÷0.4=
0.5×2.2=
1.24÷4=
3.27+0.63=
5.02×0.3=
0.3×0.5=
6.4÷4=
7.2÷1.8=
0.7÷0.35=
0.72÷1.44=
0.48÷0.04=
1.25÷2.5=
5.5+55=
16.8÷8=
0.54+2.2=
3.5-0.05=
2÷0.02=
0.25×40=
1.5×0.6=
0.32÷0.8=
12.25÷0.5=
73.5×0.1=
46.5+52.5=
0.45×102=
1.25×88=
2.64+3.85+1.54=
8×1.25=
5.6÷3.5=
4.2÷0.7÷6=
0.4×8.6×25=
0.27÷0.3=
2.5×101=
0.65×101-0.65=
2.6×7÷2.6×7=
观察已知算式,寻找规律填空.
(1)1=1×2÷2
1+2=2×3÷2
1+2+3=3×4÷2
1+2+3+4=4×
5
5
÷2
1+2+3+4+5=
5
5
×
6
6
÷
2
2
1+2+3+4+5+6+7=
7
7
×
8÷2
8÷2
1+2+3+…+n=
n
n
×
(n+1)÷2
(n+1)÷2
(2)1×2=1×2×3÷3
1×2+2×3=2×3×4÷3
1×2+2×3+3×4=3×4×5÷
3
3
1×2+2×3+3×4+4×5=4×5×
6
6
÷
3
3
1×2+2×3+3×4+4×5+5×6=
5
5
×
6
6
×
7÷3
7÷3
1×2+2×3+3×4+…+n×(n+1)=
n
n
×
(n+1)
(n+1)
×
(n+2)
(n+2)
÷
3
3
(3)1×2×3=1×2×3×4÷4
1×2×3+2×3×4=2×3×4×5÷4
1×2×3+2×3×4+3×4×5=3×4×5×
6
6
÷4
1×2×3+2×3×4+3×4×5+4×5×6=
4
4
×
5
5
×
6
6
×
7
7
÷
4
4
1×2×3+2×3×4+3×4×5+4×5×6+5×6×7=
5
5
×
6
6
×
7
7
×
8
8
÷
4
4
1×2×3+2×3×4+…+n×(n+1)×(n+2)=
n
n
×
(n+1)
(n+1)
×
(n+2)
(n+2)
×
(n+3)
(n+3)
÷
4
4
猜一猜:
1×2×3×4+2×3×4×5+3×4×5×6=
3×4×5×6×7÷5
3×4×5×6×7÷5
.
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