四年級數(shù)學(xué)整數(shù)簡便運算120道（含答案）

四年級數(shù)學(xué)整數(shù)簡便運算120道（有答案）

班級：姓名：錯題數(shù)量：

乘法交換律：axb=bxa乘法結(jié)雒:(axb)xc=ax(bxc)

肱分配律：(a+b)xc=axc-卜bxc

⑴67+42+33+58(6)26x103

=(67+33)+(42+58)=26x(100+3)

=100+100=26x100+26x3

=200=2600+78

2678

⑵258-58-26-(7)501x12

74=(500+1)x12

=(258-58)-(26+74)

=500x12+1x12

=200-100

=6000+12

=100

=6012

(8)25x(40+8)

(3)125x16=25x40+25x8

=1000+200

=125x(10+6)=1200

=125x10+125x6

=1250+750

=2000

(9)39x14+61x14

(4)50x(2x4)x25=(39+61)x14

=(50x2)x(25x4)=100x14

=100x100=1400

=10000

(10)163x8+37x8

⑸7x8x3x125

=(168+37)x8

=125x8x7x3=200x8

=1000x7x3=1600

=7000x3

=21000

(11)202x13(17)55x25+25x45

=(200+2)x13=(55+45)x25

=200x13+2x13=100x25

=2600+26=2500

=2626

(12)77x4x5(18)123x67-23x67

=77x(4x5)=(123-23)x67

=77x20=100x67

=1540=6700

(13)27x99(19)39x101-39

=27x(100-1)=39x(100-1)修正畬_QQ.ini

=27x100-27x1=39x100-39x1-3"

=2700-27=3900-39=39x100

=2673=3871=3900

(14)48x250(20)99x64+64

=12x4x250

=(99+1)x64

=12x(4x250)

=100x64

=12x1000

=6400

=12000

(15)98+303(21)76x23+24x23

=98+3+300=(76+24)x23

=102+300=100x23

=402=2300

(16)49+49x(22)12+19x12

49

=49x(1+49)=12x(1+19)

=49x50=12x20

=2450=240

(23)21+254+79+(29)480+15

46=480+3+5

“°=(21+79)+(254+46)

=160+5

=100+300

=32

=400

(30)21x99

(24)25x16x5=21x(100-1)

=25x4x4x5=21x100-21x1

=(25x4)x(4x5)=2100-21

=100x20=2079

=2000

(31)125x32

(25)52x32+48x32=125x8x4

=(52+48)x32=1000x4

=100x32=4000

=3200

(32)12x301

(26)18x137-18x37=12x(300+1)

=18x(137-37)=12x300+12x1

=18x100=3600+12

=1800=3612

(33)75x3x4

(27)450-18=75x4x3

=450+(3x6)=300x3

=450+3+6=900

=150-5-6

=25

(34)19+99x19

(28)420+35

=19x(99+1)

=420-=-(7x5)

=1900

=420+7+5

=60+5

=12

(35)256x9-46x9(41)304x22

=(256-46)x9=(300+4)x22

=210x9=300x22+4x22

=1890=6600+88

=6688

(36)13+13x49(42)(30+4)x25

=13x(1+49)=30x25+4x25

=13x50=750+100

=650=850

(37)(25+125)x8(43)38x7+62x7

=25x8+125x8=(38+62)x7

=200+1000=100x7

=1200=700

(38)541x67-67x441(44)152x8+148x8

=(541-441)x67=(152+148)x8

=100x67=300x8

=2400

=6700

(39)43x201(45)16x401

=43x(200+1)=16x(400+1)

=43x200+43x1=16x400+16x1

=8600+43=6400+16

=8643=6416

(40)102x35(46)103x23

=(100+2)x35=(100+3)x23

=100x35+2x35=100x23+3x23

=3500+70=2300+69

=3570=2369

(47)(30+2)x15(53)35x98

=35x(100-2)

=30x15+2x15

=35x100-35x2

=450+30

=3500-70

=480

=3430

(48)125x(8+16)(54)23x134-34x23

=125x8+125x16=23x(134-34)

=1000+2000=23x100

=3000=2300

(49)68x48+68x2(55)102x45

=68x(48+2)=(100+2)x45

=68x50=100x45+2x45

=3400=4500+90

=4590

(50)5x27+63x5(56)648+203

=5x(27+63)=648+2+201

=5x100=650+201

=500=851

(51)12x(40-5)(57)98x32

=12x40-12x5=(100-2)x32

=480-60=100x32-2x32

=420=3200-64

=3136

(52)64x9-14x9(58)44x25

=(64-14)x9=11x4x25

=50x9=11x100

=450=1100

(59)63+15x2(65)41x99

=63+30=41x(100-1)

=93=41x100-41x1

=4100-41

=4059

(60)43+43x39(66)765+98

=43x(1+39)=765+100-2

=43x40=863

=1720

(61)27x37+37x23(67)560+16

=(27+23)x37=560-5-(4x4)

=50x37=560+4+4

=1850=140-5-4

=35

(62)256x7-56x7(68)201x34

=(256-56)x7=(200+1)x34

=200x7=200x34+1x34

=1400=6800+34

=6834

(63)48x101-48(69)36x25

=48x(101-1)=9x4x25

=48x100=9x100

=4800=900

(64)99x62+62(70)304+297

=(99+1)x62=301+3+197

=100x62=501

=6200

(71)18x45+18x55(77)125x18

=(45+55)x18=125x(10+8)

=100x18=125x10+125x8

=1800=1250+1000

=2250

(72)226x13-26x13(78)25x35+25

=(226-26)x13=25x(35+1)

=200x13=25x36

=2600=25x4x9

=900

(73)15x301-15(79)71x23-71x13

=15x(301-1)=71x(23-13)

=15x300=710

=4500

(74)(30+8)x25(80)125x(80-8)

=30x25+8x25=125x80-125x8

=750+200=10000-1000

=950=9000

(75)25x65+25x35(81)101x89-89

=25x(65+35)=(101-1)x89

=25x100=8900

=2500

(76)75x141-75x40(82)88x22+22x12

=75x(141-40)=(88+12)x22

=75x101=2200

=7575

(83)28x57+43x(89)25x5x16

28=28x(57+43)=25x4x(4x5)

=2800=100x20

=2000

(90)56+56x49

(84)202x41=56x(49+1)

=(200+2)x41=56x50

=200x41+2x41=2830

=8200+82

=8282

(91)57x26+26x43

(85)25x19x4=(57+43)x26

=25x4x19=100x26

=1900=2600

(92)373x9-73x9

(86)47+99x47=(373-73)x9

=47x(99+1)=300x9

=47x100=2700

=4700

(93)78x101-78

(87)103x37=78x(101-1)

=7800

=(100+3)x37

=100x37+3x37

=3700+111

=3811

(94)199x53+53

(88)34x201=(199+1)x53

=34x(200+1)=10600

=34x200+34x1

=6800+68

=6868

(95)25x124-24x25(101)402x15

=25x(124-24)=(400+2)x15

=2500=400x15+2x15

=6000+30

=6030

(96)250x28(102)25+250)x4

=250x4x7=25x4+250x4

=1000x7=100+1000

=7000=1100

(97)125x16(103)199x9+199

=125x8x2=199x(9+1)

=1000x2=1990

=2000

(98)250x9x4(104)27x18+82x27

=250x4x9=27x(18+82)

=1000x9=2700

=9000

(99)48x125(105)2x46+46x18

=6x(8x125)=46x(18+2)

=6000=46x20

=920

(100)24x250(106)401x25

=6x(4x250)=(400+1)x25

=6000