四年级下册数学简便运算练习题附详解

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第 1 页 共 7 页 四年级下册简便运算练习题附详解

(1) 25×44

(2) 6.75+0.5-4.86

(3) 125×32×25

(4) (40+8)×125

(5) 11.91+8.59+20.09

(6) 6.74+12.62+24.38+3.26

(7) 13.59-6.91-0.09

(8) 415-176-24

(9) 425÷25+575÷25

(10) 4.64-2.36-1.64-0.24 (11) 30.65-(7.65+5.4)

(12) 19×96+96×81

(13) 435-(1300÷65+35)

(14) 23.4-8.54-1.46

(15) 87-2.123-0.877

(16) (125+9)×8

(17) 27×12-27×2

(18) 948+1061+52+939

(19) 25×5+74×5+5

(20) 1.29+3.7+0.71+6.3 第 2 页 共 7 页 (21) 74×53+47×74

(22) 794-198

(23) 12×(324-285)÷26

(24) 101×99

(25) 2.8+5.31+7.2+4.69

(26) 3.67×25×4

(27) 2.39+14.4+0.61

(28) 17×43-43×7

(29) 44.5×4+55.5×4

(30) 428×78+572×78 (31) 8.29+3.7+0.71+6.3

(32) 25×294×4

(33) 125×64

(34) 2169–642–358

(35) 44×25

(36) 530-475-25

(37) 6756-193-207

(38) 37+22+63+45

(39) 18×45+18×55

(40) 6.45-0.58-1.42 第 3 页 共 7 页 (41) 32×38+32×62

(42) 19×36–36×9

(43) 4000÷125÷8

(44) 8×(125×11)

(45) 125×89×8

(46) 64×99+64

(47) 72×125

(48) (100+4)×25

(49) 68×99

(50) 3200÷25÷4 (51) (320+280)÷50÷4

(52) 0.9+1.08+0.92+0.1

(53) 3.27+6.4+2.73+4.6

(54) 24×134-34×24

(55) 4900÷25÷4

(56) (339-67)×15÷24

(57) (125+7)×8

(58) (125+50)×8

(59) 437×27+27×563

(60) 72×125 第 4 页 共 7 页

四年级下册简便运算练习题答案

(1) 25×44

=25×4×11

=100×11

=1100

(2) 6.75+0.5-4.75

=6.75-4.75+0.5

=2.5

(3) 125×32×25

=125×8×4×25

=1000×100

=100000

(4) (40+8)×125

=6×8×125

=6×1000

=6000

(5) 11.91+8.59+20.09

=11.91+20.09+8.59

=32+8.59

=40.59

(6) 6.74+12.62+24.38+3.26

=(6.74+3.26)+(12.62+24.38)

=10+37

=47

(7) 13.59-6.91-0.09

=13.59-7

=6.59

(8) 415-176-24

=415-200

=215

(9) 425÷25+575÷25

=(425+575)÷25

=1000÷25

=40 (10) 4.64-2.36-1.64-0.24

=(4.64-1.64)-(2.36+0.24)

=3-2.6

=0.4

(11) 30.65-(7.65+5.4)

=30.65-7.65-5.4

=23-5.4

=17.6

(12) 19×96+96×81

=96×100

=9600

(13) 435-(1300÷65+35)

=435-(20+35)

=400-20

=380

(14) 23.4-8.54-1.46

=23.4-10

=13.4

(15) 87-2.123-0.877

=87-3

=84

(16) (125+9)×8

=125×8+9×8

=1000+72

=1072

(17) 27×12-27×2

=27×10

=270

(18) 948+1061+52+939

=(948+52)+(1061+939)

=1000+2000

=3000

(19) 25×5+74×5+5 第 5 页 共 7 页 =5×(25+74+1)

=500

(20) 1.29+3.7+0.71+6.3

=(1.29+0.71)+(3.7+6.3)

=2+10

=12

(21) 74×53+47×74

=21×100

=2100

(22) 794-198

=794-200+2

=596

(23) 12×(324-285)÷26

=12×39÷26

=12×3×13÷13÷2

=18

(24) 101×99

=100×99+99

=9999

(25) 2.8+5.31+7.2+4.69

=(2.8+7.2)+(5.31+4.69)

=10+10

=20

(26) 3.67×25×4

=3.67×100

=367

(27) 2.39+14.4+0.61

=2.39+0.61+14.4

=3+14.4

=17.4

(28) 17×43-43×7

=17×10

=170

(29) 44.5×4+55.5×4

=4×(44.5+55.5)

=400 (30) 428×78+572×78

=78×(428+572)

=78×1000

=78000

(31) 8.29+3.7+0.71+6.3

=(8.29+0.71)+(3.7+6.3)

=9+10

=19

(32) 25×294×4

=100×294

=29400

(33) 125×64

=125×8×8

=8000

(34) 2169–642–358

=2169-(642+358)

=1169

(35) 44×25

=11×4×25

=1100

(36) 530-475-25

=530-500

=30

(37) 6756-193-207

=6756-400

=6356

(38) 37+22+63+45

=(37+63)+22+45

=167

(39) 18×45+18×55

=18×100

=1800

(40) 6.45-0.58-1.42

=6.45-2

=4.45

(41) 32×38+32×62 第 6 页 共 7 页 =32×100

=3200

(42) 19×36–36×9

=36×10

=360

(43) 4000÷125÷8

=4000÷1000

=4

(44) 8×(125×11)

=8×125×11

=1000×11

=11000

(45) 125×89×8

=125×8×89

=89000

(46) 64×99+64

=64×100

=6400

(47) 72×125

=9×8×125

=9×1000

=9000

(48) (100+4)×25

=100×25+4×25

=2500+100

=2600

(49) 68×99

=68×100-68

=6800-68

=6732

(50) 3200÷25÷4

=3200÷100

=32

(51) (320+280)÷50÷4

=600÷200 =3

(52) 0.9+1.08+0.92+0.1

=(0.9+0.1)+(1.08+0.92)

=3

(53) 3.27+6.4+2.73+4.6

=(3.27+2.73)+(6.4+4.6)

=6+11

=17

(54) 24×134-34×24

=24×100

=2400

(55) 4900÷25÷4

=4900÷100

=49

(56) (339-67)×15÷24

=272×3×5÷3÷8

=272÷8×5

=34×5

=170

(57) (125+7)×8

=125×8+7×8

=1000+56

=1056

(58) (125+50)×8

=125×8+50×8

=1000+400

=1400

(59) 437×27+27×563

=27×1000

=27000

(60) 72×125

=9×8×125

=9×1000

=9000