202 1 winter vacation homework's answer to last semester's mathematics in grade four.
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I.5751969215316
12……33 20 9……3 1 13……49
II.21754 86699 9
Three. neglect
Four. < = & lt& gt
V 1. 105/3=35 (unit/hour) 35*(3+2)= 175 (unit)
2.( 1) Take one kilogram of sugar each,14+/kloc-0+18 = 42 yuan.
42/3= 14 (yuan) (2)182/14 =13 (kg)
3.27*26+ 18=720 720/72= 10
page 2
I.2 X-ray line segment X-ray countless X-rays 1 sharp 25 26
Ii.70120 75
Three. neglect
Four. neglect
5.13 6 The number of sides is not necessarily equal to the number of angles.
Intransitive verb 1. 10 hour-acute angle 6 hours-right angle 12 hours-rounded corner
3 o'clock-right angle 4 o'clock-obtuse angle
2. (Turn clockwise) Northeast, Southeast, Southeast, Southwest and Northwest, 90 45.
3. 180-40-90=50 degrees
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I.93 right angle 2 4 acute angle 12 5
Two. CBBC
Iii.60 90150 30
Four. neglect
V 1.20*8= 160 (decimeter) 2.
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I 105 1 16 530 14
Two. < & lt& lt& gt
(300-60)/6 = 40 18+ 120/20 = 24 56 1 1
Four. 1.(43+41) ÷ 7 =12 (article) 2. (180- 165)×5=75 (m) 3. 8+6 × 4.
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I. +47 0 × 0+73+39 × 2 × 2 1
Two. 9 1 7060 1200 16 158 173 1800 9 10
3.④ ⑤ ② ② ④ ② ② ⑤
Four. 1.24*5*8=960 (tree) 2.520÷80×5+520=552.5 (meter) 3.
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I.37 2 vertical 180 540 yellow
Two. Bilateral bundle branch block
Three. 52 640
Four. 1.3* 15+3*4=57 (person) 2. 120÷40× 15=45 because 45
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I. 1.48 50 29 18 68 702. ( 1) 504 766 203 353628 (2) 13568 1 409 4758 1586 7930 68 699. 1 1 1 1 1 1 ( 1234+432 1)÷5= 1 1 1 1 (2)80 9800 998000 9999×9999- 1=99980000
2.( 1)5 bags 125 kg 8 bags of 200 kg (2) 8414010 56 ÷ (84 ÷ 6) = 4 Because 4 < 6, it is less. 56÷(84÷6)=4 (days) (3) 120 20 100 8 48
120÷20× 100=600 (yuan)
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I.10/0 8000 53,453,040,530,00016900000669100000 ① ③ ②
Two. Below 90~99 60 100~98 95~88 88
○○○○○○○○○
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I. (1)1005172 24 80 23
(2)30 17 43(3)342 9 278 1380
( 1)
Three. neglect
Page 13
1. Multiplication and associative laws
Two. neglect
You should study hard.
Four. (1)12 *14 ÷ 21= 8 (yuan) 12* 14÷24=7 (pieces) (2) 60
Page 14
1. Additive associative law1505965310103569
Two. CBCB
(1)24*50*3=3600 (yuan) (2) 16* 12*5=960 (tree) (3)180 250 95 320/kloc-0
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I.241001009 50 80 24 80 20 ... 237 ...1157 ...1434 900 780134.
Two. Shooting 15 Sharp15 205000500 900 million 5 8 400 2
Three. (1)45 120 60 (2) omitted
(1)18× 8÷ 6 = 24 (km) (2) 3× 4+5 =17 (yuan)