分数加减法简便运算136题有答案okdoc.docx
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分数加减法简便运算136题有答案okdoc.docx
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分数加减法简便运算136题有答案okdoc
分数加减法简便运算专项练习136题(有答案)
(1)
+
+
﹣
(2)
﹣(
﹣)
(3)
.
(4)
﹣(
﹣)
(5)
+
+
+
(6)
+
﹣+
(7)
﹣(
+)
(8)
﹣﹣
(9)
﹣+﹣.
(10).
(11)999+99+9+.
(12)++++++++
(13)﹣+﹣
(14)﹣(﹣1)
(15)2﹣﹣.
(16)﹣0.4+﹣.
(17).
(18)
分数加减法简便运算--1
(19)
(20)
+﹣
(21)
1﹣﹣
(22)
+++
(23)
(24)
(25)
(26)+﹣
(27)﹣(﹣)
(28)++
(29)3﹣
(30)
(31)4﹣﹣
(32).
(33)+(+)
(34)﹣(+)
(35)+++.
+++
(36)
+﹣
(37)
+﹣+
(38)
分数加减法简便运算--2
+(﹣)+
(39)
0.58++1.12+
(40)
11﹣﹣.
(41)
(42)
(43)3.5﹣﹣.
(44)+++﹣﹣.
﹣+﹣
(45)
(46)﹣(+)
(47)+++.
(48)6﹣﹣
﹣+
(49)
(50)﹣(﹣)
+﹣
(51)
+++
(52)
(53)﹣+﹣
(54)+++
8﹣﹣
(55)
+﹣+
(56)
(57)﹣(+)
(58)2﹣﹣
分数加减法简便运算--3
(59)
﹣
+
(69)
1﹣(
)﹣
(60)
++
+
.
(61)
﹣(+
)
(70)
﹣(+
)
(62)
1﹣﹣﹣﹣﹣
(71)
+
+
(63)
6﹣
﹣
(72)
﹣(﹣)
(64)
(73)
+
﹣
+.
(65)
﹣+
﹣
(74)
.
(66)
﹣(﹣)
(75)
.
(67)
﹣(+
)
(76)
﹣
+
(68)
.
(77)
+
+
分数加减法简便运算--4
(78)
﹣
+
(87)
,
(79)
+
+
+
(88)+
﹣+
,
(79)
+2
+
+3
,
(89)
,
(80)++
,
(90)(2
﹣1)﹣(1﹣2
)
(81)
+
+
+
,
(90)(2
﹣1)﹣(1﹣2
),
(82)
,
(91)19.76﹣4
﹣3
,
(83)
﹣(
+
),
(92)8
﹣8
+2
,
(84)
(93)2.5×1.25×32,
(85)
(94)
﹣+
﹣,
(86)﹣+
,
分数加减法简便运算--5
(95)﹣(﹣),(105)
(96)1﹣,(106)51.27﹣8.66﹣1.34
(97)+,(107)32.5÷(0.05×50)
(98),(108)
(99),(109).
(100),(110)++﹣
(101)16×(1000+),(111)﹣(﹣)
(102)2﹣,(112)﹣(+)
(103)11+13+15+17+19+21,(113),
(104)(114)﹣(﹣),
分数加减法简便运算--6
(115)﹣(﹣),(125)﹣+,
(116)+++(126)5﹣﹣1,
(117)5+1+3+2+6+4+,(127)+++,
(118)﹣+﹣,(128),
(119)()﹣(1.375﹣)(129)1﹣﹣,
(120)+
+
+
(130)
,
(121)+
+
+
+
+,
(131)
﹣
+
﹣,
(122)+
+
,
(132)﹣(
﹣
)
(123)+
+
+
,
(133)5﹣﹣﹣
,
(124)+
+
+
+
,
(134)﹣(10﹣6)÷8,
分数加减法简便运算--7
(135)++
(136)+﹣+
分数加减法简便运算--8
参考答案:
(1)++﹣,
=(+)+(﹣),
=1+0,
=1;
(2)﹣(﹣),
=﹣+,
=
,
(3)
=()+(+),
=7+9,
=16
(4)﹣(﹣),
=﹣,
=;
(5)+++,
=(+)+(+),
=1+1,
=2;
(6)+﹣+,
=(+)+(﹣),
=1+0,
=1
(7)﹣(+),
=﹣﹣,
=,
=;
(8)﹣﹣,
=﹣(+),
=﹣1,
=;
(9)﹣+﹣,
=(+)﹣(+),
=1﹣1,
=0.
(10)11﹣2+3﹣0.2,
=11+3﹣(0.2+2),
=15﹣(0.2+2.8),
=15﹣3,
=12
(11)999+99+9+,
=(999+99+9)+×3+,
=[(1000﹣1)+(100﹣1)+(10﹣1)]+(+),
=1110﹣3+3,
=1110
(12)+++++
+++,
=+
++++(+)+(+)+(+)+(+
),
=
+
++++(+)+(+)+(+)+(
),
=
×3+(+)+(
×3)+(+
2)+(
),
=1+1+1+1+1,
=5;
(13)﹣+﹣,
=(+)﹣(+),
=﹣1,
分数加减法简便运算--9
=
(14)﹣(﹣1),
=﹣+1,
=+1,
=1;
(15)2﹣﹣,
=2﹣(+),
=2﹣1,
=1
9.﹣0.4+﹣,
=﹣+﹣,
=(+)﹣(+),
=1﹣1,
=0
,
(16)
=()+(),
=2+3,
=5.
(17)+++,
=(+)+(+),
=+1,
=1;
(18)4﹣﹣,
=4﹣(+),
=4﹣1,
=3;
(19)+(+),
=++,
=(+)+,
=1+,
=1.
(20)+﹣,
=+﹣,
=;
(21)1﹣﹣,
=1﹣(+),
=1﹣1,
=0;
(22)﹣,
=﹣,
=;
(23)+++,
=(+)+(+),
=1+1,
=2;
(24)4﹣2﹣1,
=4
﹣
2﹣1
,
=﹣
;
(25)7﹣(
﹣),
=7﹣
,
=6
.
(26)+﹣,
=﹣,
=;
分数加减法简便运算--10
(27)﹣(﹣),
=﹣,
=;
(28)++,
=(
+)+
,
=1+
,
=1
;
(29)3﹣
,
=3﹣﹣﹣,
=(3﹣)﹣(
+),
=2
﹣1,
=1
;
(30)
,
=(
+)+(+
),
=1+1,
=2;
(31)4﹣
﹣
,
=3﹣,
=3﹣,
=2,
(32)1﹣+3﹣,
=1+3﹣(+),
=5﹣1,
=4
(33)+(+),
=++,
=1+,
=1;
(34)﹣(+),
=﹣﹣,
=﹣,
=;
(35)+++,
=++(+),
=1+1,
=2.
(36)+++,
=(+)+(+),
=1+1,
=2;
(37)+﹣,
=+(﹣),
=+,
=;
(38)+﹣+,
=(﹣)+(+),
=;
(39)+(﹣)+,
=+﹣+,
=(﹣)+(+),
=+1,
分数加减法简便运算--11
=1;
(40)0.58++1.12+,
=(0.58+1.12)+(+),
=1.7+1,
=2.7;
(41)11﹣﹣,
=11﹣(+),
=11﹣1,
=10.
(42),
=()﹣,
=1﹣,
=;
(43)3.5,
=3.5﹣(),
=3.5﹣1,
=2.5
(44)+++﹣﹣,
=(+)+(+)﹣(+),
=1+﹣,
=1﹣,
=1
(45)﹣+﹣,
=+﹣(+),
=1﹣1,
=0;
(46)﹣(+),
=﹣﹣,
=2﹣,
=1;
(47)+++,
=++(+),
=1+1,
=2.
(48)6﹣﹣,
=6﹣(+),
=6﹣1,
=5;
(49)﹣+,
=+﹣,
=1﹣,
=;
(50)﹣(﹣),
=﹣+,
=+﹣,
=1﹣,
=;
(51)+﹣,
=﹣+,
=1+,
=1;
(52)+++,
=(+)+(+),
=1+1,
=2;
分数加减法简便运算--12
(53)
﹣+
﹣,
=(
+
)﹣(
+
),
=1﹣1,
=0.
(54)
+++
=(
)+(
+
),
=1+
,
=1;
(55)8﹣
=8﹣(),
=8﹣,
=7;
(56)﹣
=()+(),
=0+1,
=1;
(57)()
=﹣,
=,
=0.
(58)2﹣﹣,
=2﹣(+),
=2﹣,
=;
(59)﹣+,
=﹣(),
=﹣,
=;
(60)+++,
=(+)+(),
=1,
=;
(61)﹣(+),
=,
=,
=.
(62)1﹣﹣
﹣﹣﹣,
=
﹣﹣﹣
﹣,
=
﹣﹣
﹣
,
=
﹣
﹣
,
=
﹣
,
=;
(63)6﹣﹣,
=6﹣(+),
=6﹣1,
=5;
(64)﹣+﹣,
=(+)﹣(+),
=1﹣1,
=0;
(65)﹣(﹣),
=﹣+,
=+﹣,
分数加减法简便运算--13
=1﹣,
(71)
﹣(
)
=
;
=
﹣+
,
(66)﹣(
+
),
=
;
=
﹣﹣,
(72)
+
﹣
+
=
﹣,
=(
)+(
+),
=
.
=0+1,
=1.
(67)
,
(73)
+3
+
+1
,
=1﹣+1﹣
+1﹣+1﹣+1﹣+1﹣,
=(
+3
)+(
+1
),
=6﹣
﹣
﹣
,
=3
+2,
=6﹣,
=5
=
.
(74)
,
(68)1﹣(
)﹣
=
+
+
+
++++
,
+
,
=1﹣+﹣+﹣+﹣+,
=﹣+﹣+﹣+﹣+﹣+﹣+﹣+﹣
=(1﹣)+(﹣)+(﹣)+(﹣)+,
+﹣,
=
+0+0+0+
,
=
﹣
,
=
=
.
(69)﹣(
+
)
(75)
,
=
﹣,
=
,
=
;
=1
;
(70)++
(76)
,
=
+
+,
=
,
=1+
,
=1+
,
=1
;
=1
;
分数加减法简便运算--14
(77),
=,
=;
(78),
=,
=2+,
=2.
+2++3,
(79)
=(+)+(2+3),
=1+6,
=7.
(80)++,
=++,
=1+,
=1;
(81)+++,
=(+)+(+),
=1+1,
=2
(82),
=(+)+(+),
=1+2,
=3;
(83)﹣(+),
=﹣﹣,
=﹣﹣,
=1﹣,
=.
(84)
=(2+7)+(7+2),
=10+10,
=20;
(85)
=(1+)+(2+)+(3+)+(4+)+(5+),
=(1+2+3+4+5)+(++++),
=15+(++++﹣),
=15+(1++),
=16+,
=16;
(86)﹣+,
=+﹣,
=1﹣,
=.
(87),
=(),
=1,
=1;
(88)+﹣+,
=()+(),
=0+1,
=1;
(89),
分数加减法简便运算--15
=()+(),
=1+1,
=2.
(90)(2﹣1)﹣(1﹣2)
(90)(2﹣1)﹣(1﹣2),
=2﹣1﹣1+2,
=(2+2)﹣(1+1),
=4﹣3,
=1;
(91)19.76﹣4﹣3,
=19.76﹣(4+3),
=19.76﹣8,
=11.76;
(92)8﹣8+2,
=8+﹣(8+)+(2+),
=8+﹣8﹣+2+,
=(8﹣8+2)+(﹣+),
=2+1,
=3;
(93)2.5×1.25×32,
=2.5×1.25×4×8,
=(2.5×4)×(1.25×8),
=10×10,
=100.
(94)﹣+﹣,
=(+)﹣(+),
=1﹣1,
=0;
(95)﹣(﹣),
=(+)﹣,
=1﹣,
=.
(96)1﹣
,
=1﹣(+
),
=1﹣1,
=0;
(97)
+,
=(
)
,
=1﹣,
=;
(98)
,
=(
)+(
),
=1+
,
=1
.
(99)
,
=10
﹣(5
+4
),
=10
﹣9
,
=(9﹣9)+(1﹣),
=;
(100),
=﹣+,
=0+,
=.
(101)16×(1000+),
=16000+16×,
=16000+1,
分数加减法简便运算--16
=16001;
(102)2﹣,
=2﹣()+(),
=2﹣1,
=,
=,
=
(103).11+13+15+17+19+21,
=(11+13+15+17+19+21)+(+++++),
=(11+21)×6÷2+(1﹣+﹣+﹣+﹣+﹣
+),
=96+(1﹣),
=96+,
=96.
(104)
(105)
(106)51.27﹣8.66﹣1.34
(107)32.5÷(0.05×50)
(108)
(109).
(104)
=,
=1+,
=;
(105)
=,
=;
(106)51.27﹣8.66﹣1.34
=51.27﹣(8.66+1.34),
=51.27﹣10,
=41.27;
(107)32.5÷(0.05×50)
=32.5÷,
=,
=13;
(108)
=,
=,
=;
(109)
=,
=
(110)++﹣
(111)﹣(﹣)
(112)﹣(+)
(110)++﹣,
=(+)+(﹣),
=1﹣0,
=1;
(111)﹣(﹣),
=(+)﹣,
=1﹣,
=;
(112)﹣(+),
分数加减法简便运算--17
=
﹣,
=(+)﹣(
+),
=
﹣
,
=1﹣1,
=0.
=
(119)(
)﹣(1.375﹣)
(113)
,
=
﹣1.375+
=(
)+(﹣)+(﹣
)+⋯+(﹣
),
=2
++3
﹣1.375
=
+﹣+﹣+⋯+﹣
,
=3+1
=
﹣,
=
.
=
.
(120)+
+
+
(114)
﹣(
﹣),
=
+×+
×+
×,
=
﹣(
﹣
),
=
×(1+)+
×(+
),
=
﹣
,
=
+×,
=
;
=
×(1+
),
(115)
﹣(
﹣),
=
×,
=
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