整数简便运算题有参考答案过程.docx

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整数简便运算题有参考答案过程.docx

整数简便运算题有参考答案过程

四年级数学整数简便运算120道

(1)67+42+33+58

(2)258-58-26-74

(3)125×16

(4)50×(2×4)×25

(5)7×8×3×125

(6)26×103

(7)501×12

(8)25×(40+8)

(9)39×14+61×14

(10)163×8+37×8

(11)202×13

(12)77×4×5

(13)27×99

(14)48×250

(15)98+303

(16)49+49×49

(17)55×25+25×45

(18)123×67-23×67

(19)39×101-39

(20)99×64+64

(21)76×23+24×23

(22)12+19×12

(23)21+254+79+46

(24)25×16×5

(25)52×32+48×32

(26)18×137-18×37

(27)450÷18

(28)420÷35

(29)480÷15

(30)21×99

(31)125×32

(32)12×301

(33)75×3×4

(34)19+99×19

(35)256×9-46×9

(36)13+13×49

(37)(25+125)×8

(38)541×67-67×441

(39)43×201

(40)102×35

(41)304×22

(42)(30+4)×25

(43)38×7+62×7

(44)152×8+148×8

(45)16×401

(46)103×23

(47)(30+2)×15

(48)125×(8+16)

(49)68×48+68×2

(50)5×27+63×5

(51)12×(40-5)

(52)64×9-14×9

(53)35×98

(54)23×134-34×23

(55)102×45

(56)648+203

(57)98×32

(58)44×25

(59)63+15×2

(60)43+43×39

(61)27×37+37×23

(62)256×7-56×7

(63)48×101-48

(64)99×62+62

(65)41×99

(66)765+98

(67)560÷16

(68)201×34

(69)36×25

(70)304+297

(71)18×45+18×55

(72)226×13-26×13

(73)15×301-15

(74)(30+8)×25

(75)25×65+25×25

(76)75×141-75×40

(77)125×18

(78)25×35+25

(79)71×23-71×13

(80)125×(80-8)

(81)101×89-89

(82)88×22+22×12

(83)28×57+43×28

(84)202×41

(85)25×19×4

(86)47+99+47

(87)103×37

(88)34×201

(89)25×5×16

(90)56+56×49

(91)57×26+26×43

(92)373×9-73×9

(93)78×101-78

(94)199×53+53

(95)25×124-24×25

(96)250×28

(97)125×16

(98)250×9×4

(99)48×125

(100)24×250

(101)402×15

(102)25+250)×4

(103)199×9+199

(104)27×18+82×27

(105)2×46+46×18

(106)401×25

(107)72×101

(108)42×(30-1)

(109)101×85-85

(110)25×19

(111)152×49+51×152

(112)50×(60+8)

(113)93×99+93

(114)13×125×8

(115)125×17+63×125

(116)492-145-155

(117)43×25×2

(118)24×25

(119)28×111-28×11

(120)63×8+91×63+63

参考答案

(1)67+42+33+58

=(67+33)+(42+58)

=100+100

=200

(2)258-58-26-74

=258-58-(26+74)

=200-100

=100

(3)125×16

=125×8×2

=1000×2

=2000

(4)50×(2×4)×25

=(50×2)×(4×25)

=100×100

=10000

(5)7×8×3×125

=(7×3)×(8×125)

=21×1000=21000

(6)26×103

=26×(100+3)

=26×100+26×3

=2600+78

=2678

(7)501×12

=(500+1)×12

=500×12+1×12

=6000+12

=6012

(8)25×(40+8)

=25×40+25×8

=1000+200

=1200

(9)39×14+61×14

=(39+61)×14

=100×14=1400

(10)163×8+37×8

=(163+37)×8

=200×8=1600

(11)202×13

=(200+2)×13

=200×13+2×13

=2600+26

=2626

(12)77×4×5

=77×(4×5)

=77×20=1540

(13)27×99

=27×(100-1)

=27×100-27×1

=2673

(14)48×250

=12×4×250

=12×(4×250)

=12×1000

=12000

(15)98+303

=98+3+300

=102+300

=402

(16)49+49×49

=49×(1+49)

=49×50

=2450

(17)55×25+25×45

=25×(55+45)

=25×100

=2500

(18)123×67-23×67

=(123-23)×67

=100×67=6700

(19)39×101-39

=39×(101-1)

=39×100=3900

(20)99×64+64

=(99+1)×64

=100×64

=6400

(21)76×23+24×23

=(76+24)×23

=100×23

=2300

(22)12+19×12

=12×(1+19)

=12×20

=240

(23)21+254+79+46

=(21+79)+(254+46)

=100+300=400

(24)25×16×5

=25×4×4×5

=(25×4)×(4×5)

=100×20=2000

(25)52×32+48×32

=(52+48)×32

=100×32

=3200

(26)18×137-18×37

=18×(137-37)

=18×100

=1800

(27)450÷18

=450÷(3×6)

=450÷3÷6

=150÷6

=25

(28)420÷35

=420÷(7×5)

=420÷7÷5

=60÷5=12

(29)480÷15

=480÷3÷5

=160÷5

=32

(30)21×99

=21×(100-1)

=21×100-21×1

=2100-21

=2079

(31)125×32

=125×8×4

=1000×4=4000

(32)12×301

=12×(300+1)

=12×300+12×1

=3600+12=3612

(33)75×3×4

=75×4×3

=300×3=900

(34)19+99×19

=19×(99+1)

=1900

(35)256×9-46×9

=(256-46)×9

=210×9=1890

(36)13+13×49

=13×(1+49)

=13×50=650

(37)(25+125)×8

=25×8+125×8

=200+1000

=1200

(38)541×67-67×441

=(541-441)×67

=100×67=6700

(39)43×201

=43×(200+1)

=43×200+43×1

=8600+43=8643

(40)102×35

=(100+2)×35

=100×35+2×35

=3500+70

=3570

(41)304×22

=(300+4)×22

=300×22+4×22

=6600+88

=6688

(42)(30+4)×25

=30×25+4×25

=750+100=850

(43)38×7+62×7

=(38+62)×7

=100×7

=700

(44)152×8+148×8

=(152+148)×8

=300×8=2400

(45)16×401

=16×(400+1)

=16×400+16×1

=6400+16=6416

(46)103×23

=(100+3)×23

=100×23+3×23

=2300+69

=2369

(47)(30+2)×15

=30×15+2×15

=450+30=480

(48)125×(8+16)

=125×8+125×16

=1000+2000

=3000

(49)68×48+68×2

=68×(48+2)

=68×50

=3400

(50)5×27+63×5

=5×(27+63)

=5×100=500

(51)12×(40-5)

=12×40-12×5

=480-60

=420

(52)64×9-14×9

=(64-14)×9

=50×9=450

(53)35×98

=35×(100-2)

=35×100-35×2

=3500-70

=3430

(54)23×134-34×23

=23×(134-34)

=23×100=2300

(55)102×45

=(100+2)×45

=100×45+2×45

=4500+90

=4590

(56)648+203

=648+2+201

=650+201=851

(57)98×32

=(100-2)×32

=100×32-2×32

=3200-64

=3136

(58)44×25

=11×4×25

=11×100=1100

(59)63+15×2

=63+30=93

(60)43+43×39

=43×(1+39)

=43×40

=1720

(61)27×37+37×23

=(27+23)×37

=50×37

=1850

(62)256×7-56×7

=(256-56)×7

=200×7

=1400

(63)48×101-48

=48×(101-1)

=48×100

=4800

(64)99×62+62

=(99+1)×62

=100×62=6200

(65)41×99

=41×(100-1)

=41×100-41×1

=4100-41

=4059

(66)765+98

=765+100-2

=863

(67)560÷16

=560÷(4×4)

=560÷4÷4

=140÷4

=35

(68)201×34

=(200+1)×34

=200×34+1×34

=6800+34

=6834

(69)36×25

=9×4×25

=9×100=900

(70)304+297

=301+3+197

=501

(71)18×45+18×55

=(45+55)×18

=100×18

=1800

(72)226×13-26×13

=(226-26)×13

=200×13

=2600

(73)15×301-15

=15×(301-1)

=15×300

=4500

(74)(30+8)×25

=30×25+8×25

=750+200=950

(75)25×65+25×25

=25×(65+25)

=25×100

=2500

(76)75×141-75×40

=75×(141-40)

=75×101

=7575

(77)125×18

=125×(10+8)

=125×10+125×8

=1250+1000

=2250

(78)25×35+25

=25×(35+1)

=25×36

=25×4×9

=900

(79)71×23-71×13

=71×(23-13)

=710

(80)125×(80-8)

=125×80-125×8

=10000-1000

=9000

(81)101×89-89

=(101-1)×89

=8900

(82)88×22+22×12

=(88+12)×22

=2200

(83)28×57+43×28

=28×(57+43)

=2800

(84)202×41

=(200+2)×41

=200×41+2×41

=8200+82

=8282

(85)25×19×4

=25×4×19

=1900

(86)47×99+47

=47×(99+1)

=47×100

=4700

(87)103×37

=(100+3)×37

=100×37+3×37

=3700+111

=3811

(88)34×201

=34×(200+1)

=34×200+34×1

=6800+68=6868

(89)25×5×16

=25×4×(4×5)

=100×20=2000

(90)56+56×49

=56×(49+1)

=56×50

=2830

(91)57×26+26×43

=(57+43)×26

=100×26

=3600

(92)373×9-73×9

=(373-73)×9

=300×9

=2700

(93)78×101-78

=78×(101-1)

=7800

(94)199×53+53

=(199+1)×53

=10600

(95)25×124-24×25

=25×(124-24)

=2500

(96)250×28

=250×4×7

=1000×7

=7000

(97)125×16

=125×8×2

=1000×2

=2000

(98)250×9×4

=250×4×9

=1000×9

=9000

(99)48×125

=6×(8×125)

=6000

(100)24×250

=6×(4×250)

=6000

(101)402×15

=(400+2)×15

=400×15+2×15

=6000+30

=6030

(102)(25+250)×4

=25×4+250×4

=100+1000

=1100

(103)199×9+199

=199×(9+1)

=1990

(104)27×18+82×27

=27×(18+82)

=2700

(105)2×46+46×18

=46×(18+2)

=46×20

=920

(106)401×25

=(400+1)×25

=400×25+1×25

=10000+25

=10025

(107)72×101

=72×(100+1)

=72×100+72×1

=7200+72

=7272

(108)42×(30-1)

=42×30-42×1

=1260-42

=1218

(109)101×85-85

=(101-1)×85

=8500

(110)25×19

=25×(20-1)

=25×20-25

=500-25

=475

(111)152×49+51×152

=152×(49+51)

=152×100

=15200

(112)50×(60+8)

=50×60+50×8

=3000+400

=3400

(113)93×99+93

=93×(99+1)

=9300

(114)13×125×8

=13×(125×8)

=13000

(115)125×17+63×125

=125×(17+63)

=125×80

=10000

(116)492-145-155

=492-(145+155)

=492-300

=192

(117)43×25×2

=43×(25×2)

=43×50

=2150

(118)24×25

=6×(4×25)

=600

(119)28×111-28×11

=28×(111-11)

=2800

(120)63×8+91×63+63

=63×(8+91+1)=6300

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