【七大类型简便计算狂刷题】四下数学+答案
1 / 15
1a+b=b+a
2(a+b)+c=a+(b+c)
3a b=b a
4(a b) c=a (b c)
5(a+b) c=a c+b c a (b+c)=a b+a c
6 ( ) a-b-c=a-(b+c) a-(b+c)=a-b-c
7 ( ) c)
1.
607 (57-23) (123+213) (57-54)]
=20638 =16
=34
25 (79 4) 78+36 22
(800 4) 25
=7900 =32 =3600
2. ( )
167+289+33+11 (36 54-984)
=(167+33)+(289+11) =(1944-
=500 =40
49 25+25 51 (67-52)]
=2500 =25
2 / 15
3.
=100000
735-35-65
=735-(35+65)
=735-100
=635
=7200
-1)
-
=14355
4.
=45000
=3
=3300
5.
=100000
72-
=72-16
=56
729+269-169+271
=(729+271)+(269-169)
=1000+100
=1100
=13500
-52)]
=11
=125
6.
=940
903-
=903-880
=23
3 / 15
=3612
521+78-293
=599-293
=306
7.
25 78 4
=7800
-80
=10
=1000+100
=1100
286+42+114
=(158+42)+(286+114)
=200+400
=600
=600
-
=(1260-
=25
8.
17
=17 100
=1700
125
=9000
=19000
125
=50000
9.
125 4)
=10000+500
=10500
(100-
-
=2500-200
=2300
4 / 15
10.
45
=(54+45)+99x99
=99+99x99
=9900
=33
=333000
1999+999x999
=1000+999+999x999
=1000x(999+1)
=1000000
11.
=68 100+68
=6800+68
=6868
=256000+512
=256512
=14800+74
=14874
0+154
=92400+154
=92554
12.
=10 5
=15
=20
(2046-1059-
- -
=682-353-245
=84
=35
13.
=1100
=960
5 / 15
=10
=96
14.
=9900
354+218+82
=354+(218+82)
=354+300
=654
=76000
76+158+124+142
=(276+124)+(158+142)
=400+300
=700
=7900
879-432-68
=879-(432+68)
=879-500
=379
15.
=7850
=7488+256
=7744
=1300
16.
37+5+45
=37+(5+45)
=37+50
=87
=65+(24+6)
=65+30
=95
78+16+4
=78+(16+4)
=78+20
=98
38+46+2
=38+2+46
=40+46
=86
6 / 15
17.
39+27
=39+1+26
=40+26
=66
=49+1+47
=50+47
=97
37+46
=37+3+43
=40+43
=83
59+37
=59+1+36
=60+36
=96
18.
25+18-15
=25-15+18
=10+18
=28
21-25+29
=21+29-25
=50-25
=25
36+25-16
=36-16+25
=20+25
=45
32-28+38
=32+38-28
=70-28
=42
19.
158+262+142+138
=(158+142)+(262+138)
=300+400
=700
-178
-1)
100
=17800
=100000
=73
20.
-178
-1)
=17800
9.27-1.43-4.57
=9.27-(1.43+4.57)
=9.27-6
=3.27
-254) 27]
=2808
21.
-
=(128-
=3400
-1)
-
=6800-68
=6732
=7
7 / 15
13.7+0.98+0.02+4.3
=(13.7+4.3)+(0.98+0.02)
=18+1
=9
=11000
22.
7.83+13.91+6.09+21.17
7.83+13.91+6.09+21.17
=(7.83+21.17)+(13.91+6.09)
=29+20
=49
-5)
=5000
-(96+17)]
-113]
=70
53)
=3149
23.
0.12+3.4=3.52 3.4 0.15=3.25 0.6 1000=600
4.23 0.17 0.83=3.23 0.06 15 10
58 2 125 4=1000
24.
-
=400-20+25
=405
-
=52
=4500+90
=4590
73.9+1.33+0.67+0.13
=(73.9+0.13)+(1.33+0.67)
=74.09+2
=76.09
8 / 15
25.
28.5+7.06+12.94
=28.5+(7.06+12.94)
=28.5+20
=48.5
55 12.72 2.28
=55-(12.72+2.28)
=55-15
=40
=6300
14.5-(4.5+2.8)
=14.5-4.5-2.8
=10-2.8
=7.2
=100000
=2700+27
=2727
26.
=10000+1000
=11000
=100000
=15
9+32
=3200
4.4+3.8+15.6
=4.4+15.6+3.8
=20+3.8
=23.8
5.36+(83.4-15.07)
=45.36+68.33
=113.69
=8+392
=400
5.62-7.9+2.38-2.1
=(15.62+2.38)-(7.9+2.1)
=18-10
=8
-36)
=6
27.
3.27+6.4+2.73+4.6
=(3.27+2.73)+(6.4+4.6)
=6+11
=17
- -96
- -
-34-1)
=960
9 / 15
=100000
289-
=289-(89+30)
=289-89-30
=200-30
=170
28.
=100000
=1100
488+137+263+22
=(488+22)+(137+263)
=510+400
=910
=8800
346-132-68
=346-(132+68)
=346-200
=146
=12
29.
721+16+184
=721+(16+184)
=721+200
=921
60-(2.74+8.17)
=60-10.91
=49.09
=18000
(187-
=500
30.
=800
18.68+(9.14-8.68)
=18.68+9.14-8.68
=18.68-8.68+9.14
=10+9.14
=19.14
-125
-
-1)
=1000
10 / 15
225- -25
=225-75-25
=225-(75+25)
=225-100
=125
=75+225
=300
-
=1650
31.
=9000
=3800
=300+3
=303
=32
32.
24.75-4.96-6.75
=24.75-6.75-4.96
=18-4.96
=13.04
=60
=8700
=800
12.64-(2.75+7.64)
=12.64-2.75-7.64
=12.64-7.64-2.75
=5-2.75
=2.25
11 / 15
33.
6.3+6.44+2.7+3.56
=(6.3+2.7)+(6.44+3.56)
=9+10
=19
=6300
=26000
136-32-68
=136-(32+68)
=136-100
=36
34.
12 300 3600 200 34 6800 50 110 5500
25 18 4 1800 600 50 30000 8
26 30 780 147 256 353 756
35.
299
365 300 1
765 1
764
47
1)
470
3800
2)
3600 72
3672
63)
630
421 175 25
421 (175 25)
421 200
221
36.
=12500+1000
=13500
=3700
-
-12+25)
=800
14.68+7.5-11.95
=22.18-11.95
=10.23
-16)]
=2450
32.5-0.46-4.54
=32.5-(0.46+4.54)
=32.5-5
=27.5
12 / 15
37.
1.29+3.7+0.71+6.3
=(1.29+0.71)+(3.7+6.3)
=2+10
=12
=78000
=89000
-57
-1)
=5700
38.
-
-3)
=6600
2700-425-175
=2700-(425+175)
=2700-600
=2100
=11000
41+127+59+173
=(41+59)+(127+173)
=100+300
=400
=19
=5600
39.
=36
=11000
67+263+33
=67+33+263
=100+263
=363
-
-63)
=5900
13 / 15
40. .
=2300
-120)
=2880
=1000
41.
74+157+126+243
=(74+126)+(157+243)
=200+400
=600
=7700
836-269-131
=836-(269+131)
=836-400
=436
=48
=8989
=100000
42.
4500+90
4590
143+816+57+84
(143+57)+(816+84)
200+900
1100
7300
65
43.
0.28 5 3 12 3=9
44 89-23-17=49 3=90
(4 2)=7 125 37 8=37000 2.01 10=20.1
0.42 0 (25+15)=0 66+5 0=66
14 / 15
44.
(20-
=2400
=100000
=5600
-12.6
-1)
=1260
567-186-14
=567-(186+14)
=567-200
=367
158-
=158-
=158-9
=149
45.
355+260+140+245
=(355+245)+(260+140)
=600+400
=1000
968-52-48
=986-(52+48)
=986-100
=886
=5600
=500+1000
=1500
46.
138 62
800 (138+62)
800 200
600
7)
230
11000
47.
(103
12500
41+127+59+173
(41+59)+(127+173)
100+300
400
13
15 / 15
4900
3600
5700
48.
=11000
18.36-2.17-4.83
=18.36-(2.17+4.83)
=18.36-7
=11.36
76.8-53.29+4.9
=23.51+4.9
=28.41
-
2]
=8
49.
=5000+100
=5100
=8900
378-178-161-39
=(378-178)-(161+39)
=200-200
=0
-25)
=309+6
=315
=7000
-39)]
=7
50.
188+69+12+231
=(188 12) (69
231)
=200 300
=500
=49000
402
=537 400 2
=937 2
=939
32)
=1600
369 128 72
=369 (128 72)
=369 200
=169
=(200
=5200 78
=5278
标签： #数学计算；校内数学
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作者：几几米
分类：中小学教育资料
价格：1积分
属性：15 页
大小：6.54MB
格式：PDF
时间：2025-03-18
