Elementary school sixth grade volume two mathematics solution equation.. must be detailed.. also must process write down 2x+3x=60 3.6x-2.8x=12 100x-x=198 18x+2x+60 5x+6x=12.1 6.6x-5x=8 4x-x=24 1.5x-x=1 1.9x+0.4x=9.2

Elementary school sixth grade volume two mathematics solution equation.. must be detailed.. also must process write down 2x+3x=60 3.6x-2.8x=12 100x-x=198 18x+2x+60 5x+6x=12.1 6.6x-5x=8 4x-x=24 1.5x-x=1 1.9x+0.4x=9.2

2x+3x=60
5x=60
x=12
3.6x-2.8x=12
0.8x=12
x=15
100x-x=198
99x=198
x=2
18x + 2x = 60
20x=60
x=3
5x+6x=12.1
11x=12.1
x=1.1
6.6x-5x=8
1.6x=8
x=5
4x-x=24
3x=24
x=8
1.5x-x=1
0.5x=1
x=2
1.9x+0.4x=9.2
2.3x=9.2
x=4

The application problem of percentage must be solved by equation

How much is 50% of 40?
Let 50 be x% of 40
40×x％=50
x=50÷40×100
x=125
A: 50 is 125% of 40

How to simplify and calculate the proportion of different units?
2:30: 2 and 3:4 hours (Simplified)
885m: 0.9km (ratio)

2:30: 2 and 3:4 hours (Simplified)
=150: 165
=10：11
885m: 0.9km (ratio)
=885m: 900m
=59：60

Sixth grade volume one math ratio exercises fast

The sixth grade students of Huangshan primary school are divided into three groups to participate in tree planting. The ratio of the first group to the second group is 5:4, and the ratio of the second group to the third group is 3:2. It is known that the number of students in the first group is 15 less than the total number of students in the second and third groups?

1、 What percentage is 25 less than 40
2、 On March 1 last year, Li Yang saved 400 yuan of pocket money and deposited it in the bank. At the beginning of school on September 1, she donated all the money she took out of the bank to the disaster area. How much did Li Yang donate? (the monthly interest rate is 0.6%)

1.(40-25)/40=37.5%
2.400 * (1 + 0.6% * 6) = 414.4 yuan

Several exercises in Volume 1 of grade 6 of primary school
The ratio of stuffing and material of peanut dumplings is 1:1.5, and the ratio of stuffing and material of bean paste dumplings is 1:1. How many kilograms of stuffing and material are needed to make 1.5kg peanut dumplings and 1kg bean paste dumplings? 2 according to the national standard, the ratio of the number of teachers in urban primary schools to the number of students is 1:19?
The number of students in school is no, I can't think of it

Speed for each 14: solving equations, simplifying ratio, ratio!

7(2x-1)-3(4x-1)=4(3x+2)-1; (5y+1)+ (1-y)= (9y+1)+ (1-3y); 20%+(1-20%)(320-x)=320×40% 2(x-2)+2=x+1 2(x-2)-3(4x-1)=9(1-x) x/3 -5 = (5-x)/2 2(x+1) /3=5(x+1) /6 -1 (1/5)x +1 =(2x+1)/4 (5-2)/2 - (4+x)/3 =...

1. Finding ratio 2. Simplifying ratio 3. Solving equation
Ratio
1 and 2 moleculars 1: 0.03 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 2.5km: 150m & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 3 moleculars 2: 6 moleculars 5 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 15cm: 10 and 2 moleculars 1m
3 tons: 75 kg
Simplification ratio
91:26 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 9 molecule 4 & nbsp;: 3 molecule 2 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp;: 8 minute 1 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 0.9 ton: 500kg
3.2l: 120ml & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 10 molecule 6:0.35 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 2.8 & nbsp;: 3 molecule 1 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 0.25:2
solve equations
X △ 3 = 1.3 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 4x + 1.2 × 5 = 24.4 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 27-130% x = 3 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; (4 and 2 molecules 1-x) × 8 molecules 3 = 0.75
240÷120%X=100

Ratio
1:0.03 = 1:0.02 = 50
2.5km：150m =2500:150=50/3
3 moleculars 2:6 moleculars 5 = 4:5 = 0.8
15 cm: 10 and 2 molecules, 1 m = 15: (21 * 50) = 1 / 70
3T: 75kg = 3 * 1000: 75 = 40
Simplification ratio
91:26
9 moleculars 4:3 moleculars 2 = 2:3
5 molecular1:8 Molecular1 = 8:5
0.9t: 500kg = 0.9 * 1000:500 = 9:5
3.2L ：120mL =3200*120=80:3
10 molecule 6:0.35 = 6:3.5 = 12:7
2.8:3 and 2 moleculars 1 = 5.6:7 = 4:5
0.25 ：2=1:8
solve equations
X÷3=1.3
x=3.9
4X+1.2×5=24.4
4x=18.4
x=4.6
27-130%X=3
1.3x=24
x=240/13
(4 and 2 moleculars 1-x) × 8 moleculars 3 = 0.75
9/2-x=0.75*8/3=2
x=5/2
240÷120%X=100
24/(1.2x)=10
12x=24
x=2

1. Simplify the ratio first, then calculate the ratio 2. Solve the equation
0.08 6.4:1.6 36 minutes: 0.5 hours 3 / 7 16:0.36 0.5:8 57.2:24:32
5 / 6x + 2x = 68 / 5x - 4 / 1 = 16 / 9 / 7X - 12 / 5x = 2 / 3
0.08 6.4:1.6 36 minutes: 0.5 hours 3 / 7 16:0.36 0.5:8 5 / 7.2:24:32 simplify the ratio and calculate the ratio. It's a comparison
6X of 5 + 2x = 5x of 68 - 1 of 4 = 9x of 16 - 5x of 12 = 2 of 3

20:1:0.08 = 5:8 = 5 / 8 (5 / 8) 6.4:1.6 = 64:16 = 4:1 = 4 36 minutes: 0.5 hours = 36:30 = 6:5 = 1.25:4:7:3 = 28:15 = 1 and 13 / 1516:0.36 = 1600:36 = 400:9 = 44 and 9:40.5:8:5 = 20:25 = 4:5 = 0.87.2:5:4 = 72:8 = 9:1

Fill in the blanks for vertical calculation of decimal multiplication
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The ball answers

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