9×1-4/3+8/15-12/35+63

(1))998++3.2+523+6.8 (2)5) (9)400÷125÷8 (3)(14-16)×12 (10)134×)34×(2+1334) (18)125×8.8 (4)4.35+4.25+3.65+3.75 (12)3.4×99+3.4 (19)17.15-8.47-1.53 (5)1 题目和参考答案——精英家教网——
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& 题目详情
(8)998+1246
(16)4+3.2+5+6.8
(2)12-(1+2)
(9)400÷125÷8
(17)25×(37×8)
(3)(-)×12
(10)1×2×(11)34×(2+)
(18)125×8.8
(4)4.35+4.25+3.65+3.75
(12)3.4×99+3.4
(19)17.15-8.47-1.53
(5)17-3-4
(13)÷2+×
(20)0.125×0.25×32
(6)22.3-2.45-5.3-4.55
(14)(++)×72
(21)4.25-3-(2-1)
(7)187.7×11-187.7
(15)43×+57.125×-0.5
(22)2.42÷+4.58×-4÷3.
分析:根据加法和乘法的运算定律,减法、除法的运算性质,及加减法的速算方法进行计算.解答:解:(1)5-(997+3)+3==128;(2)1225-(127+225)==857;(3)(13-14)×12=13×12-16×12=4-2=2;(4)4.35+4.25+3.65+3.75=(4.35+3.65)+(4.25+3.75)=8+8=16;(5)==914;(6)22.3-2.45-5.3-4.55=22.3-5.3-(2.45+4,55)=17-7=10;(7)187.7×11-187.7=118.7×(11-1)=118.7×10=1187;(8)998+1246=(998+2)+0+4;(9)400÷125÷8=400÷(125×8)=400÷;(10)134××47×;(11)34×(2+1334)=34×2+34×=81;(12)3.4×99+3.4=3.4×(99+1)=3.4×100=340;(13)79÷215+511×29=(79+29)×511=1×511=511;(14)()×72=×72+524×72=66+28+15=109;(15).125×12-0.5=(43.875+57.125)×0.5-0.5=101×0.5-0.5=50.5-0.5=50;(16)413+3.2+523+6.8=(413+523)+(3.2+6.8)=10+10=20;(17)25×(37×8)=25×8×37=200×37=7400;(18)125×8.8=125×8+125×0.8=0;(19)17.15-8.47-1.53=17.15-(8.47+1.53)=17.15-10=7.15;(20)0.125×0.25×32=(0.125×8)×(0.25×4)=1×1=1;(21)4.25-356-(216-134)=(4.25+134)-(356+216)=6-6=0;(22)2.42÷34+4.58×113-4÷3=(2.42+4.58-1)×43=6×43=8;点评:此题主要考查,利用运算定律、运算性质进行小数、分数四则混合运算的简便计算.
科目:小学数学
题型:阅读理解
(1)438+203
(2)256+199
(3)416-302
(4)325-198
(5)278+498
(6)3.6+2.7+6.4+7.3
(8)1.3+4.25+3.7+3
(10)5-1.4-1.6
(11)30-8.12-4.13-7.75
(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)(-+)×12
(31)(+-)÷
(32)24×(+-)
(33)24÷(+-)
(34)1.25×3.6+1.25×+
(35)3.3×+0.75×+75%
(36)×6.6+7.5×
(37)9.56×180-95.6×8
(38)4.8×37+47×6.3
(39)9.5×8.8+0.12×95
(40)×21
(41)×33
(44)÷42
(45)6×0.75+5×-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)-(-)+
(53)84-(54-16)
(54)84-(54+16)
(56)3.6×31.4+43.9×6.4
(57)(+)×
(58)×+÷
(60)×-×
(61)×÷×
(62)-×-
(63)×[÷(+)]
(64)(0.9+5)×3+2.3
(65)56×
(66)+÷+
(67)(+)÷(+)
(68)÷(-)
(69)(-)÷
(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)
(78)4×(+)
(80)2-(+)-
(81)×+×
(82)×+×
(83)×9+
(84)(5+)×
(85)(+)×24
(86)(20+)×
(87)×39×
(88)×(+)
(89)(-)×12
(90)×(26×)
(92)17×-
(93)(+)×
(94)(+)÷
(95)(+)÷3
(96)(-)÷
(97)÷+÷
(98)×(10+)
(99)(21+)÷
(100)×+×
(101)÷+÷
(102)(-)÷
(103)×++
(104)_×-
(105)-(÷+)
(106)+×+
(107)1-÷-
(108)×+÷4
(109)5-(4+)
(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)(+)×36
(118)1.2×5.7-1.2+5.3×1.2
(119)0.825×102-82.5
(120)46×
(121)560÷16÷5
(122)3÷2.5
(123)84+(54-16)
(124)+++
(125)-(÷+)
(126)3×(+)+
(127)7.2÷(5-0.75+0.25)
(128)725÷25+275÷25
(129)××
(130)×45-÷
(131)48×(-)
(132)×+×
(133)(32+)÷4
(134)÷÷
(135)46×
(136)×+÷9
科目:小学数学
1.3+4.25+3.7+3.75=
17.15-(3.5-2.85)=
3.4×99+3.4=
4.8×1.01=
0.4×(2.5÷73)=
(1.6+1.6+1.6+1.6)×25&&&&&&&
12.3-2.45-5.7-4.55=
0.125×0.25×64=
64.2×87+0.642×1300=
78×36+7.8×741-7=
×+0.125×+0.5=
2.42÷+4.58×-4÷3=
4.25-3-(2-1)=
3.8÷3.9+3.9÷0.1+0.1÷3.9=
12.1-(+)×105=
科目:小学数学
(1)×[+(&-0.25)]
(2)×+÷
(3)1.8÷2.7-17÷51
(4)99.9×99+99.9&&&&&
(5)15.8-+14.2-
(6)3×9×(+)
科目:小学数学
题型:解答题
(1)(8)998+1246(16)4+3.2+5+6.8(2)12-(1+2)(9)400÷125÷8(17)25×(37×8)(3)(-)×12(10)1×2×(11)34×(2+)(18)125×8.8(4)4.35+4.25+3.65+3.75(12)3.4×99+3.4(19)17.15-8.47-1.53(5)17-3-4(13)÷2+×(20)0.125×0.25×32(6)22.3-2.45-5.3-4.55(14)(++)×72(21)4.25-3-(2-1)(7)187.7×11-187.7(15)43×+57.125×-0.5(22)2.42÷+4.58×-4÷3.
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