Class 5 (2) is going to have a picnic. They divide 42 bottles of mineral water and 30 bottles of coke equally among the groups, and they are just finished It's OK

Class 5 (2) is going to have a picnic. They divide 42 bottles of mineral water and 30 bottles of coke equally among the groups, and they are just finished It's OK

Decomposition quality factor
42=7x3x2
30=5x3x2
So they can be divided into two groups equally, 21 bottles of mineral water and 15 bottles of coke for each group
They can also be equally divided into three groups, each with 14 bottles of mineral water and 10 bottles of coke
They were equally divided into six groups, each with seven bottles of mineral water and five bottles of coke
42/6=7
30/6=5
The mineral water and coke of each group are equal
Find a factor of 42 and 30
42:1、2、3、6、7、14、21、42
30:1、2、3、5、6、10、15、30
The common factors are 2,3,6
42 / 2 = 21 (bottle) 30 / 2 = 15 (bottle)
42 / 3 = 14 (bottles) 30 / 3 = 10 (bottles)
42 / 6 = 7 (bottles) 30 / 6 = 5 (bottles)
Answer: ---.
About 50 mixed operations of rational numbers (including addition, subtraction, multiplication, division, and power)
(1) (-9)-(-13)+(-20)+(-2) (2) 3+13-(-7)/6 (3) (-2)-8-14-13 (4) (-7)*(-1)/7+8 (5) (-11)*4-(-18)/18 (6) 4+(-11)-1/(-3) (7) (-17)-6-16/(-18) (8) 5/7+(-1)-(-8) (9) (-1)*(-1)+15+1 (10) 3-(-5)*3/(-15) (11) ...
There are 9 tons of goods available in two kinds of trucks, big trucks transport 2 tons each time, small trucks transport 1 ton each time. If the goods are transported in one time, how many reasonable vehicle allocation schemes are there?
108 / 24 = 4.5 (ton) 4.5 + 1.6 = 6.1 (ton) 108 / 6.1 = 17.7 [approximately equal to] = 18 (Times) a: a large truck can transport 18 times
The list method should be used to solve 45 large trucks and 0 small trucks
There are 44 large trucks and 2 small trucks
There are 43 large trucks and 4 small trucks
。。。。。。
One large truck and 88 small trucks
Big truck 0, small truck... Spread out
The list method should be used to solve 45 large trucks and 0 small trucks
There are 44 large trucks and 2 small trucks
There are 43 large trucks and 4 small trucks
。。。。。。
One large truck and 88 small trucks
There are 0 large trucks and 90 small trucks
Because there is only 90 tons of total weight in the title, there is no limit to the rest. There are 46 options in total
Four
How much can I buy 153 bottles of orange juice?
The money for three bottles of orange juice is equal to the money for five bottles of mineral water. 1. How many bottles of mineral water can you buy for 15 bottles of orange juice? 2. How many bottles of orange juice can you buy for 15 bottles of mineral water?
1. 15 / 3 * 5 = 25 bottles
2. 15 / 5 * 3 = 9 bottles
1、15/3*5=25
2、15/5*3=9
The mixed operation of rational number for 50
Add, subtract, multiply and divide
(1) (-9)-(-13)+(-20)+(-2)
(2) 3+13-(-7)/6
(3) (-2)-8-14-13
(4) (-7)*(-1)/7+8
(5) (-11)*4-(-18)/18
(6) 4+(-11)-1/(-3)
(7) (-17)-6-16/(-18)
(8) 5/7+(-1)-(-8)
(9) (-1)*(-1)+15+1
(10) 3-(-5)*3/(-15)
(11) 6*(-14)-(-14)+(-13)
(12) (-15)*(-13)-(-17)-(-4)
(13) (-20)/13/(-7)+11
(14) 8+(-1)/7+(-4)
(15) (-13)-(-9)*16*(-12)
(16) (-1)+4*19+(-2)
(17) (-17)*(-9)-20+(-6)
(18) (-5)/12-(-16)*(-15)
(19) (-3)-13*(-5)*13
(20) 5+(-7)+17-10
(21) (-10)-(-16)-13*(-16)
(22) (-14)+4-19-12
(23) 5*13/14/(-10)
(24) 3*1*17/(-10)
(25) 6+(-12)+15-(-15)
(26) 15/9/13+(-7)
(27) 2/(-10)*1-(-8)
(28) 11/(-19)+(-14)-5
(29) 19-16+18/(-11)
(30) (-1)/19+(-5)+1
(31) (-5)+19/10*(-5)
(32) 11/(-17)*(-13)*12
(33) (-8)+(-10)/8*17
(34) 7-(-12)/(-1)+(-12)
(35) 12+12-19+20
(36) (-13)*(-11)*20+(-4)
(37) 17/(-2)-2*(-19)
(38) 1-12*(-16)+(-9)
(39) 13*(-14)-15/20
(40) (-15)*(-13)-6/(-9)
(41) 15*(-1)/12+7
(42) (-13)+(-16)+(-14)-(-6)
(43) 14*12*(-20)*(-13)
(44) 17-9-20+(-10)
(45) 12/(-14)+(-14)+(-2)
(46) (-15)-12/(-17)-(-3)
(47) 6-3/9/(-8)
(48) (-20)*(-15)*10*(-4)
(49) 7/(-2)*(-3)/(-14)
(50) 13/2*18*(-7)
answer:
1 -18
2 103/6
3 -37
49
5 -43
6 -(20/3)
7 -(199/9)
8 54/7
9 17
10 2
11 -83
12 216
13 1021/91
14 27/7
15 -1741
16 73
17 127
18 -(2885/12)
19 842
20 5
21 214
22 -41
23 -(13/28)
24 -(51/10)
25 24
26 -(268/39)
27 39/5
28 -(372/19)
29 15/11
30 -(77/19)
31 -(29/2)
32 1716/17
33 -(117/4)
34 -17
35 25
36 2856
37 59/2
38 184
39 -(731/4)
40 587/3
41 23/4
42 -37
43 43680
44 -22
45 -(118/7)
46 -(192/17)
47 145/24
48 -12000
49 -(3/4)
50 -819
To transport 29.5 tons of coal, a 4-ton truck should be used for three times, and the rest should be transported by a 2.5-ton truck. How many times will it take to complete the transportation?
The tonnage of the first three times: 4 × 3 = 12 (tons), the remaining tonnage: 29.5-12 = 17.5 (tons), the number of times to be transported: 17.5 △ 2.5 = 7 (Times); the comprehensive formula: (29.5-4 × 3) △ 2.5, = 17.5 △ 2.5, = 7 (Times); a: it will take 7 times to complete the transportation
One kind of orange juice is made of fruit and water in the mass ratio of 1:25. How many milliliters of water is contained in a 520 ml bottle of orange juice?
Total number of copies: 1 + 25 = 26 (copies); 520 × 2526 = 500 (ML); answer: 500 ml of water
Who can give me 15 bands of mixed operations of rational numbers
(-9)-(-13)+(-20)+(-2)=-9+13-20-23+13-(-7)+6=3+13+7+6(-2)-8-14-13=-2-8-14-13(-7)+(-5)-(-8)+3= -7-5+8+3(-11)-4-(-18)+18=-1-4+18+184+(-11)-1-(-3)=4-11-1+3(-17)-6-16-(-18)=-17-6-16+185+7+(-1)-(-8)=5+7-1+8...
(-0.1)+(+3.4)+(-1.9)
Original formula = [(- 0.1) + (- 1.9)] + 3.14
=-2+3.4
=1.4
（-27）+（-31）+27+（-4）+31
Original formula = [(- 27) + 27] + [(- 31) + 31] + (- 4)
=0+0+（-4）
=... unfold
(-0.1)+(+3.4)+(-1.9)
Original formula = [(- 0.1) + (- 1.9)] + 3.14
=-2+3.4
=1.4
（-27）+（-31）+27+（-4）+31
Original formula = [(- 27) + 27] + [(- 31) + 31] + (- 4)
=0+0+（-4）
=-4
3-（-5）-8+（-21）
Original formula = 3 + 5 + (- 8) + (- 21)
=8+（-29）
=-21
（-1/4）+1/3-1/2+2/3
Original formula = (- 1 / 4) + 1 / 3 + (- 1 / 2) + 2 / 3
=【（-1/4）+（-1/2）】+1/3+2/3
=-3/4+1
=1 / 4 "put away
39 + [- 23] + 0 + [- 16] = it's arranged by the teacher. I'm also writing it
[-18]+29+[-52]+60= 19
[-3]+[-2]+[-1]+0+1+2= -3
[-301]+125+301+[-75]= 50
[-1]+[-1/2]+3/4+[-1/4]= -1
[-7/2]+5/6+[-0.5]+4/5+19/6= 1.25
After 13 tons of cement are used, there are still 7 tons left. How many tons are there in each truck
13 + 7 = 20 / 5 = 4 tons a: 4 tons of cement per truck
4 tons
13 + 7 = 20 / 5 = 4 tons
There are four tons per car
A bottle of orange juice contains 32%. What does it mean
It means that pure orange juice accounts for 32% of a bottle of orange juice
Orange juice accounts for 32% of the total
The content of fruit juice in fruit juice beverage refers to the content of original fruit juice, which is an important index to identify fruit juice beverage. Generally, its value is evaluated by potassium, phosphorus, amino acid, L-proline, total D-isocitric acid and total flavonoids
Orange juice accounts for 32% of the total liquid, and the rest is water or additives
Concentration.
Orange juice 32% water 68%
It means the concentration of orange juice in this bottle? That is, a bottle of orange juice contains 32% real orange juice
Represents the volume of a bottle of orange juice
68% water + 32% juice