小数加减法专项练习200题.docx

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小数加减法专项练习200题

小数加减法专项练习200题(有答案)

(1)7.4+12.86

(10)12.42+0.48

(2)20-5.674

(11)0.56+11.534

(3)141.2-48.98

(12)44-22.13

(4)102+4.36

(13)91-22.035

(5)32.15-27.45

(14)52.6+21.237

(6)12.9+5.01

(15)9.15・2.18

 

 

(7)29.46・(9.46+3.8)

(16)3.85・1.5+1.32,

 

(17)15.4+6.87

(8)15.75+0.65-2.75+3.35

(18)

(9)65.71・4・99

3.56+27.84

(19)100・82.13=17.87

(29)5.9+28・65・16.57

 

(20)123.56-47.9+51.7

(30)57.5・3.25-16.75,

 

(21)2.7+3.1+2.9+3.2,

(31)6.02+3.6+1.98

 

(22)28.42+19.48

(32)1.29+3.7+2.71+6.3

(23)42.56+3.124

(33)3・07・0.38-1.62

(24)81・30.75

(34)3.25+1.79-0.59+1.75

(25)15.6十0.237

(35)7.5+4.9-6.1

(26)148.2・25・62・24.38

(36)14.8+7.9・4.8

(27)4.52-0.74・0・26

(37)2.608+2.84

(28)0.42+5.4+1.58+2.6

(38)6.07-3.869

 

(39)1.5-0.306

(49)120-17.83-2.17,

(40)76.8+26.82

(50)17.17-6.8-3.2-6.17

(41)102.07-37.257

(51)73.8-1.64-13.8-5.36

(42)48.64+18.6

(52)6.75・(0.9+3.75)

 

 

(43)54.7514.75,

(53)27.38-5.34+2.62-4.66

 

(44)4.68+14.79+5.32-10.79,

(54)35.72-4.9-(5.72+5.1)

 

(45)48.9-12・7・0・3,

(55)0.73・0.25-0.73+0.25

 

(46)56.4・39.7+24.3,

(56)5.3+0.1+5.3-0.1

 

(47)3.6-2.8+3.4-7.2,

(57)12.7-4.8-5.2.

(59)

(60)

(61)

(62)

(63)

(64)

(65)

(66)

(67)

(68)

4.58+2.39+(5.42+7.61)

(69)1+12.7+5.9+17.3

 

9.05・3.86-3.14

(70)

270-42.5・17.5

20・9.18・0.82

(71)

15.68・(7.78・4.32)-2.32,

6.53・(1.53+2.6)

(72)

0.9+9.9+99.9+999.9,

5.52・1.074・0.926

(73)

25.46・8.23-1.76,

4.21+1.04+0.79

(74)

9.4+0.3-6.4,

1.36+4.85+2.64+6.15

(75)

15.25+4.72+4.75+5.28,

83.7・12.83-0.17

(76)

34,823-(4.82+15.2),

4.32+5.43+6.68

(77)

12.7■4.8■5.2,

17.17・6.8-3.2,

(78)

3.1+25.78+6.9,

(80)2.15+8.73+1.27+7.85

(90)15.17-(3.6+4.9),

 

(81)11.87・(8・2+1.87),

(91)35.6+(12.6-4.4),

 

(82)5.42-3.87-1.13,

(92)16.4+3.5+83.6+166.5

 

(93)4.65・2.55-1.45,

(83)4・38・1・56+0.62・0.44,

 

(84)46・7・15.03-4.97

(94)1.28+0.86+38.72,

 

(85)4.52+0.61+1.39+6.48

(95)25.74・3・57・6.43,

 

(86)4・27・(1.96・1.73)

(96)14.5・4・68・5.32,

 

(97)0.485+0.64+3.36,

(87)7.27-(1.98+0.27),

(100)5.76+2.43+0.24+10.57,

(110)27.73-(4.73-1.85),

 

(101)9・28・(3・28+2・55),

(111)3.84+[26.5・(20-8.6)],

(102)9.5+4.85-6.13,

(112)7.38・5.14+3.62・2・86,

(103)10.75-1.86・2・75・3.16,

(113)5.86+13.08・9・27,

 

 

(104)1.3+0.94+0.06+7.7,

(114)25.4-(15.4-6.4),

 

(105)4.45+0.63+5.55,

(115)47.23・7.23・5.89,

 

(106)45.5・(0.98+5.5),

(116)4.45+0.63+5.55,

 

 

(107)0.96-0.28+0.04-0.72,

(117)5.28・(2.9+1.28),

(119)

(120)

(121)

(122)

(123)

(124)

(125)

(126)

(127)

(128)

0.96・0.28+0.04・0.72,

(129)13.67-(5.45+3.67),

9.42+7.39+1.58,

(130)

4.26+5.48-1.26+4.52,

18.4-1・6・5.4,

(131)

14,67+25.91+15.33+4.09,

75.7+39.4・23.86,

(132)

10.75-(2.4-0.86),

21.21+38.38-9.79,

(133)

9.61-4.38+0.35,

47.28+1.39+52.72,

(134)

3.87+4.92+1.13,

2・45・1.68+1.54,

(135)

46.24-8.66-1.34,

15-8.13-1.87,

(136)

21.9-9.22-0.78+8.1,

5.14+3.225・6.302,

(137)

35.47+39.88-12.37,

3.95+5.36-1.95,

(138)

93.21-5.99-14.01,

42.37-(12.37-9.78),

(150)

1.3+2.83+8.7+0.17,

38.78-19.59+41.22・30.41,

(151)

2.47・2.2-3.8+7.53,

1.9+19.9+199.9+0.3

(152)

6.89+4.7+2.11+5.3,

429+31.1+2.04,

(153)

7.46・2.37-1.63,

100・27.2・42.8,

(154)

14-(3.65+0.24),

9・(3.02+1.25),

(155)

70.8-1.25-1.75,

1・8・1.57+0.2,

(156)

5.81+8.3+4.19+11.7,

5.03・2.5+0.96,

(157)

4.2+7.64+5.8+2.36,

(140)

(141)

(142)

(143)

(144)

(145)

(146)

(147)

6.8+5.26+3.74+3.2,

(169)

15.19+3.36+4.64+4.81,

6.21・3.8+2.2,

(170)

4.7+7.69+5.3+2.31,

6.03+3.7+2.97,

(171)

53.78・13.6-37.4+6.22,

17.43・6.57・2.43,

(172)

60・(21.5■&8)+7.3,

20.47・(1.47+6.8),

(173)

9.5+4.85-6.13»

13.26+4.71+3.47+5.29,

(174)

75.8-(15.3-4.8),

22.74+8.68・13.74,

(175)

51.27・8.66-1.34,

12.56・6.64・3.36,

(176)

28.4-3.96-1.04+4.6,

45.5・(0.98+5.5),

(177)

70.8・7.25-1.75

(159)

(160)

(161)

(162)

(163)

(164)

(165)

(166)

(167)

(168)13.6+7.94+6.4,

(178)5.81+8.3+4.19+11.7

(179)794-198,

(189)15.37・7・59+5・73・12.41,

6756-193・207,

(190)

11.72・7.85-(1.26+0.46),

0.9+1.08+0.92+0.1,

(191)

15.37+28.44+12.56,

13.59-6.91-0.09,

(192)

12.64・(3.96+4.64),

4.58+3.38+(5.48+6.62)

(193)

36.26-4.78+3.74,

73.75・(4.3+8.75)

(194)

7.34+7.57+12.66+6.43,

5・(4.19・2.83),

(195)

78.65-23.12-14.88,

1.39+0.72+0.61+3.28,

(195)

4.58+2.39+(5.42+7.61),

8・3・7・6.3,

(196)

8.27+5.84+1.73+2.16,

&28・(1.28+3.7),

(197)

18.51-9.08-0.92,.

(180)

(181)

(182)

(183)

(184)

(185)

(186)

(187)

(224)10-4.44-5.56,

(218)75.36-24.9+24.64-25.1,

 

(219)12.56-6.64-3.36,

(225)32.63+7.89-6.4,

 

(220)45.5・(0.98+5.5),

(226)3.97+0.7-1.32,

 

 

(221)6+7.94+6.4,

(227)30-(3.8+0.75),

(222)5.41+3.46・2・46,

(228)75.6-(14.3-8.3),

(223)2・03・0・18-2.82+7.97,

参考答案:

(1)7.4+12.86=20.26;

7.4

十12.86

20.26

(2)20・5.674=14.326:

20

-5.674

14.326

(3)141.2-48.98=92.22;

141.2

-4&98

9222

(4)102+4.36=106.36;

102

-4.36

106.36

(5)32.15・27.45=4.7;

3215

-27.45

4.7验算:

21A5亠4.7

32.15

(6)12.9+5.01=17.91;

12.9

十5.01

17.91

验算:

17.91

・129

(7)29.46-(9.46+3.8),

=29.46・9.46・3.8,

=20・3.8,

=16.2;

(8)15.75+0.65-2.75+3.35,

=(15.75・2.75)+(0.65+3.35),=13+4,

=17;

(9)65.71・4.99,

=65.71・(5・0.01),

=65.71-5+0.01,

=60.71+0.01,

二60.72;

(10)12.42+0.48=12.9,

(11)0.56+11.534=12.094,

(12)44・22.13=21.87,

44

-22.13

21.87

(13)91・22.035=68.965,

91

-22.035

6殳965

(14)52.6+21.237=73.837,

526

+21.237

73.837

(15)9.15-2.18=6.97•

9.15

-2.18

07

(16)3・83・1.5+1.32,

=2.35+1.32,

=3.67;

(17)15.4+6.87=22.27

15.4

+6.87

22.27粧昇:

22.27

一15.4

6.87

(18)3.56+27.84=31.4

3.56

+27.84

31.40验算:

31.4

-27.84

3.56

(19)100・82.13=17.87

100

-82.13

17.87验算:

17.8+82.1

100.00

(20)123.56-47.9+51.7=127.36

123.56

-47.9

75.66十51.7

127.36

验算:

127.36

-51.7

75.66+47.9

123.56

(21)2.7+3.1+2.9+3.2,

=2.7+(3.1+2.9)+3.2,

=2.7+6+3.2,

=11.9.

(22)28.42+19.48=47.9

28.4:

2

+19.4:

8

"90验算:

47.9

-28.42

19.48

(23)42.56+3.124=45.684

42.56

+3.124:

4

验算:

4

42.560

(24)81-30.75=50.2581

-30.75

50.25验算:

50.25

+30.75

81.00

(25)15.6+0.237=15.837

15.6

+0.237

 

86

5.5.

 

0.237

(26)148.2・25・62・24.38=14&2・(25.62+24.38),

=148.2・50,

二98.2.

(27)4.52・0.74・0.26

二4.52・(0.74+0.26)

二4.52・1

=3.52;

(28)0.42+5.4+1.58+2.6

=(0.42+1.58)+(5.4+2.6)

=2+8

=10;

(29)5.9+28.65・16.57=17.98;

28.65

+5.9

34.55

-16.57

17.98

(30)57.5・3.25・16.75,

=57.5・(3.25+16.75),

=57.5・20,

=37.5;

(31)6.02+3.6+1.98

二6.02+1.98+3.6,

=8+3.6,

=11.6;

(32)1.29+3.7+2.71+6.3

=(1.29+2.71)+(3.7+6.3),

二4+10,

=14;

(33)3.07・0.38-1.62

=3.07・(0.38+1.62),

=3.07・2,

=1.07;

(34)3.25+1.79・0.59+1.75

=(3.25+1.75)+(1.79・0.59),=5+1.2,

二6.2;

(35)7.5+4.9・6.1

=12.4・6.1,

=6.3;

(36)14.8+7.9・4.8

=14.8・4.8+7.9,

=10+7.9

=17.9

(37)2.608+2.84=5.448,

2.608

+2.84

5.448

(38)6.07・3.869二2.201,

6・07

-3.869

2.201

(39)1.5-0.306二1.194,

1.5

-0.306

1.194

(40)76.8+26.82=103.62,

76.8

+26.82

103.62

(41)102.07・37.257二64.813,

102.07

-37.257

64.813

(42)48.64+18.6二67.24.

48.64

+18.6

67.24

(43)54.75・5.25・14.75,

=54.75・(14.75+5.25),

=54.75・20,

=34.75;

(44)4.68+14.79+5.32-10.79,

=(4.68+5.32)+(14.79・10.79),

=10+4,

=14;

(45)48.9・12.7・0.3,

=48.9・(12.7+0.3),

=48.9・13,

=35.9;

(46)56.4・39.7+24.3,

=16.7+24.3,

二41;

(47)3.6・2.8+3.4・7.2,

=(3.6+13.4)・(2.8+7.2),

=17・10,

=7;

(48)3.67+18.5+6.33,

=(3.67+6.33)+18.5,

=10+18.5,

=28.5;

(49)120-17.83・2.17,

=120-17.83・2.17,

=120・(17.83+2.17),

=120-20,

=100;

(50)17.17・6.8・3.2・6.17

=(17.17・6.17)・(6.8+3.2),=11・10,

=1;

(51)73.8・1.64・13.8・5.36=73.8・13.8・(1.64+5.36),二60・7,

=53;

(52)6.75・(0.9+3.75)

二6.75・3.75・0.9,

=3・0.9,

=2.1;

(53)27.38・5.34+2.62・4.66

=22.04+2.62・4.66,

=24.66・4.66,

二20;

(54)35.72・4.9・(5.72+5.1)

=35.72・(4.9+5.72+5.1),

=35.72・15.72,

=20;

(55)0.73・0.25・0.73+0.25

=0.75・0.75・0.25+0.25,

二0・0.25+0.25,

=0・0,

=0:

(56)5.3+0.1+5.3-0.1

=5.3+5.3+0.1・0.1,

=10.6+0.1・0.1,

=10.7・0.1,

=10.6;

(57)12.7・4.8・5.2.

二12.7・(4.8+5.2);

=12.7・10,

=2.7.

(58)23.25・6.75-3.25

=23.25・(6.75+3.25),

=23.25・10,

=13.25.

(59)4.58+2.39+(5.42+7.61)

=(4.58+5.42)+(2.39+7.61)=10+10,

=20:

(60)9.03・3.86・3.14,

二9.03・(3.86+3.14),

二9.03・7,

=2.05;

(61)20・9.18・0.82,

=20・(9.18+0.82),

=20・10,

=10.

(62)6.53・(1.53+2.6),

-6.53-1.53-2.6,

=4・2.6,

=1.4.

(63)5.52・1.074・0.926,

二5.52・(1.074+0.926),

二5.52・2,

=3.52.

(64)4.21+1.04+0.79,

二4.21+0.79+1.04,

=5+1.04,

二6.04

(65)1.36+4.85+2.64+6.15,

=(1.36+2.64)+(4.85+6.15),

二4+11,

=15;

(66)83.7・12.83・0.17,

二83.7・(12.83+0.17),

二83.7・13,

=70.7:

(67)4.32+5.43+6.68,

二4.32+6.68+5.43,

=11+5.43,

=16.43;

(68)17.17・6.8・3.2,

=17.17・(6.8+3.2),

=17.17・10,

=7.17;

(6

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