20 19 answers to the last semester's mathematics in the fourth grade of winter vacation homework primary school.
Fifth pages
First, remove the C edge.
Ii. 1203040506
987960
760,000 digits are numbers of 0, 1, 2, 3, 4.
750,000 digits are numbers of 5, 6, 7, 8 and 9.
Page six
One,
1, 100,000100 million
2100 billion100 billion
3. Thousands of people
4. High
5、9999999
6,7 million, 6 million, 4 million,150.
7、4 8
8 10700020 1720
Two million four hundred and fifty-five thousand one hundred and ninety-eight yuan.
1,070,700
Thirty-four million one hundred thousand nine hundred
7058 1.5 million
46.5 thousand
Three. 3576 100 80050 300050005
82000603 1000000000
Four. 222000 220200 200202
Page seven
One,
1, 1.2 million, 3 million.
2. Straight and sharp
3. Degree
4. A tick mark with an angle of 0
5、 120 60 120 360
Two. √××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××
Third, ellipsis
Four. 1 2 1
10
Page Eight
I. omission
II. 30 km/h 45 2000
Three. 3 198 6500 9338 69360
Four. 120 240 360 420 480
Verb (abbreviation of verb) 27× 169=4563
195×28=5460
6. 136×48=6528 (yuan)
Page nine
I. 5 Time distance 9 17 83
Ii. 9 1 12
Third, yes.
Four. √ √
Verb (abbreviation of verb)135×14+30 =1920
90× 125= 1 1250
8×24×60= 1 1520 is shorter.
Page 10 omitted
Page eleven
First, the longitudinal parallel.
vertical line
vertical line
changeful
Two. ××× √
Third, ellipsis
Four. 9 18
Verb (abbreviation for verb) negligence
Page 12
I. omission
Second, 1, D 2, b.
Three. 280× 52 = 14560 208× 35 = 7280 36× 225 = 8 100
40×330= 13200
Iv. 1, 120×30=3600 (m)
2. (47+30) × 4 = 308km
Page 13
I. omission
Second, 692 ÷ 31≈ 23 321≈ 43 ≈ 8 846 ≈ 91≈ 9 93 ≈ 30 ≈ 3.
56 1÷79≈7 420÷58≈7
Three, 1, one two two, one two seven four
4. 4800 ÷ 60 = 80 820 ÷ 40 = 20 20×15 = 300 46× 20 = 920.
V. 1, 60÷ 10=6 (1) 2, 79÷20≈4 3, 200 50 = 4 (section)
4、 1550÷30=5
5 (piece) 5,80 ÷18 ≈ 4 (days)
6. Level III: 203÷40≈5 (pieces) Level IV: 300 ≈ 52 ≈ 6 (pieces)
Page 14
I (2)(3) is a cuboid (6) is a cube (2)(3)(5)(6)(8) is a parallelogram.
(1)(4) is trapezoidal.
Second, 1, × 2, × 3, × 4 and ×
Third, ellipsis
Page 15
I. omission
2. 260 ÷ 50 = 5 …10/60 ÷ 40 = 4 570 ÷ 70 = 8 …10 320 ÷ 60 = 5 … 20.
Third, ellipsis
Four. 1, 7 2, 7 3, 19 15 1
Verb (abbreviation of verb) 1, 200÷40=5 (day) 2, 98÷20=4 (piece) ... 18 (root)
3.3 10÷60≈6 (vehicle)
Page 16
Listen carefully in class and finish your homework carefully.
Page 17
I. 320 640128016001616000
Two. 1, (3) 2, ( 1)(3)(4)
Third, ellipsis
Fourth, ellipsis
Page 18
I. 39810119377
Two. 5 6 5 6
Three. 234 ÷ 39 = 6 50 1 ÷ 69 = 7 … 18 230 ÷ 26 = 8 … 22
1 18÷26=4… 14 150÷35=4… 10 360÷63=5…45
Four. 1, √ 2, √ 3, ×
Verb (abbreviation of verb) 1, 149÷ 17=8 (lower limit) ... 13 (Ben)
2.36×8+4=292 (tree)
Page 19
1, (1) Sports Art (2) Sports Vocal Music (3)
2. Omission
3. Give Lingling some eye drops first, then change the gauze for Xiangxiang, and finally arrange treatment for Fangfang according to the order of injection.
2×3+2×3+5= 17 minutes
4,49 ÷ (1+2) =16 ...1first report1,and then report 2.
Page 20
I. omission
Second, 1, 537000 54 2, 303,600 4,20 1 000200 5,1
Three. 1, × 2, √ 3, × 4, ×
Fourth, 1, B 2, B 3, b
Verb (abbreviation for verb) negligence
Six, 1, sports 2, sports 3, 2
Page 2 1
I. omission
Two. 1, × 2 ,× 3, √ 4, √.
Three. 480× 25 = 12000 740 ÷ 24 = 30 … 20 258 ÷ 14 = 18 … 6
63× 182= 1 1466 240×37=8880 243÷27=9
4. 1, (50-30)×3=60 (km) 2, 456÷38= 12.
3, 38×46 1748 (yuan) 4, 196÷28=7 (vehicle)
Page 22
I =5 is =2 Small =4 Learning =8 Students =7.
Page 23
1.( 1) 10, 100000, 1 00000 (2)100000 (3)10000 (4) 7 million.
Two. ×√√×××
Third, > >; & lt& lt
4. 8.96 million, 300,000, 40 1 10,000
Five, 260,000, 1.65 million, 250,000, 4 million
Page 24
I. (1) 25000800 (2) 99994 (3)1050200010.502 million.
Two. ( 1) 58230000 (2) 27306 (3) 7032000 (4) 10080020
( 1) 1000896 & gt； 746096 >740696
(2)440400 >400404 & gt44400 >40440
4, 5-90-4
Verb (abbreviation for verb) negligence
Page 25
I. (1) 70 (2) 4 (3) 0,0, infinite (4)6 (5) 10000 1, 65438+ million.
Second, b, b, b, b.
Three. 27 450-45-9
Four. 849999999 75000000