四年级下册四则运算题型大全,内附答案,十分详尽!
前几天老师分享过几类四则运算的经典习题,
不知道大家有没有自己去算一算呢?
今天老师把答案分享给同学们,
希望你们都能认真核对一下!
题型一:四则运算
先算乘除后算加减,
有括号先算括号,
先算小括号,再算大括号!
75÷〔138÷(100-54)〕
=75÷[138÷46]
=75÷3
=25
85×(95-1440÷24)
=85×(95-60)
=85×35
=2975
80400-(4300+870÷15)
=80400-(4300+58)
=80400-4358
=76042
240×78÷(154-115)
=240×78÷39
(此处可以先算78÷39
只有加减,或只有乘除的,可以调换顺序)
=240×2
=480
1437×27+27×563
=27×(1437+563)
=27×2000
=54000
280+840÷24×5
=280+35×5
=280+175
=455
325÷13×(266-250)
=325÷13×16
=25×16
=25×4×4
=400
58870÷(105+20×2)
=58870 ÷(105+40)
=58870÷145
=406
137×27+27×563
=27×(137+563)
=27×700
=18900
81432÷(13×52+78)
=81432÷(676+78)
=81432÷754
=108
(947-599)+76×64
=348+76×64
=348+4864
=5212
36×(913-276÷23)
=36×(913-12)
=36×901
=32436
题型二:加法的结合律与交换律
48+25+175
=48+(25+175)
=48+200
=248
578+143+22+57
=(578+22)+(143+57)
=600+200
=800
357+288+143
=(357+143)+288
=500+288
=788
378+527+73
=378+(527+73)
=378+600
=978
58+39+42+61
=( 58+42)+(39+61)
=100+100
=200
75+34+125+366
=(75+125)+(34+366)
=200+400
=600
125+75+320
=(125+75)+320
=200+320
=520
158+395+105
=158+(395+105)
=158+500
=658
822+197+78
=(822+78)+197
=900+197
=1097
3.乘法分配律(一):
34×72+34×28
=34x(72+28)
=34x100
=3400
7×48+7×52
=7x(48+52)
=7x100
=700
35×37+65×37
=37x(35+65)
=37x100
=3700
85×82+82×15
=82x(85+15)
=82x100
=8200
25×97+25×3
=25x(97+3)
=25x100
=2500
76×25+25×24
=25x(76+24)
=250o
16×17+16×23
=16x(17+23)
=16x40
=640
27×36+27×64
=27x(36+64)
=27x100
=2700
73×36+36×27
=36x(73+27)
=36x100
=3600
4.乘法分配律(二):
38×99+38
=38x99+38x1
=38x(99+1)
=38x100
=3800
75×299+75
=75 x299+75x1
=75x(299+1)
=75x300
=22500
102×99+102
=102x99+102x1
=102x(99+1)
=102x100
=10200
39+9×39
=39x1+39x9
=39x10
=3900
99×128+128
=99x128+128x1
=128x(99+1)
=128x100
=12800
27+99×27
=27x1+99x27
=27x(99+1)
=27x1oo
= 27oo
34+199×34
=34x1+34x199
=34x(199+1)
=34x200
=6800
35×99+35
=35x99+35x1
=35x(99+1)
=35x100
=3500
5.乘法交换结合律(一):
25 ×125×32
=25x125x4x8
=(25x4)x(125x8)
=100x1000
=100 000
(15×25)×4
=15x(25x4)
=15x100
=1500
38×25×4
=38x(25x4)
=38x1oo
=38oo
35×2×5
=35x(2x5)
=35x10
=350
(60×25)×4
= 60x(25x4)
=60x100
=600
(125×5)×8
=(125x8)x5
=1000x5
=5000
25×17×4
=25x4x17
=100x17
=1700
(25×125)×(8×4)
=(125x8)x(25x4)
=1000x1oo
=1000oo
38×125×8×3
=38x3x(125x8)
=114x1000
=114000
这些是老师一点点打出来的,
希望能带给孩子带来帮助!
如果喜欢老师,
记得帮老师分享一下哈!
非常感谢大家一直以来的支持!
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