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Solving equation problems and calculation problems (with answers) More than 45 equations, more than 30 calculations The answer must be yes
1 2x-10.3x=15 2 0.52x-(1-0.52)x=80 3 x/2+3x/2=7 4 3x+7=32-2x 5 3x+5(138-x)=540 6 3x-7(x-1)=3-2(x+3) 7 18x+3x-3=18-2(2x-1) 8 3(20-y)=6y-4(y-11) 9 -(x/4-1)=5 10 3[4(5y-1)-8]=6
If it's a little harder, come as many as you have!
Can you see the answer clearly
1、 Solve the equation
32X+88=3480 204-X+76=196 X-（135-98）=25 4X-15=17
8×125-40X=600 0.4X÷5＝0.6 2X＋0.82＝0.82 3＋0.5X＝7
X+80×2=200 45-2X=10+15 8×2.5- 4x=18 6÷（1.5+ x）=1.5
4＋x＋3.9=15.1 x－0.13－7.5=3.24 7.5×4.2 - 6x = 1.5 7.8x - x- 6.6 = 7
0.5X＋4＝6 9.5x -5x =13 3X＋2.4＝2.4 80X÷4＝12
2、 List the equations and find the solutions
60 is 30 less than three times of a number. What's the number?
2. Four times of a number is 24 more than 60. What's the number?
3. The difference between a number and 6.4 divided by 3.6, the quotient is 26, what is the number?
4. 1.8 times of a number is 1.96 less than 2 times of it?
5. 635 is 35 times more than 4 times a number. Find the number
6. The difference between 657 and 157 is five times that of a number. What's the number?
3、 Calculate the following questions
9.56＋14.5＋5.5 14.15＋2.9＋1.85 4.3＋2.05＋6.7＋0.95
6.9＋4.8＋3.1 0.456＋6.22＋3.78 15.89＋(6.75－5.89)
4.02＋5.4＋0.98 5.17－1.8－3.2 13.75－(3.75＋6.48)
3.68＋7.56－2.68 7.85＋2.34－0.85＋4.66 35.6－1.8－15.6－7.2
3.82＋2.9＋0.18＋9.1 9.6＋4.8－3.6 7.14－0.53－2.47
5.27＋2.86－0.66＋1.63 13.35－4.68＋2.65 73.8－1.64－13.8－5.36
0.25×16.2×4 3.6×102 9.43-（6.28-1.57）
3.72×3.5＋6.28×3.5 36.8－3.9－6.1 15.6×13.1－15.6－15.6×2.1
4.8×7.8＋78×0.52 6.4×0.25＋3.6÷4 25.48－(9.4－0.52)
32＋4.9－0.9 4.8－4.8×0.5 (1.25－0.125)×8
4.8×100.1 56.5×9.9＋56.5 7.09×10.8－0.8×7.09
4.2÷3.5 320÷1.25÷8 18.76×9.9＋18.76
3.52÷2.5÷0.4 4.78÷0.2＋3.44 3.9－4.1＋6.1－5.9
0.49÷1.4 1.25×2.5×32 3.6－0.6×2
3.65×10.1 3.6－3.6×0.8 15.2÷0.25÷4
5.6÷3.5 9.6÷0.8÷0.4 4.2×99＋4.2 17.8÷(1.78×4)
0.89×100.1 146.5－(23＋46.5) 5.83×2＋4.27 （45.9－32.7）÷8÷0.125
3.83×4.56＋3.83×5.44 4.36×12.5×8 9.7×99＋9.7
27.5×3.7－7.5×3.7 8.54÷2.5÷0.4 0.65×101
3.2×0.25×12.5 3.14×0.68＋31.4×0.032 5.6÷1.25÷0.8÷2.5÷0.4
7.2×0.2＋2.4×1.4 8.9×1.01 7.74×（2.8－1.3）＋1.5×2.26
（4.8×7.5×8.1）÷（2.4×2.5×2.7） 3.9×2.7＋3.9×7.3＋41
18－1.8÷0.125÷0.8 4.34×2.73＋56.6×0.273 12.7×9.9＋1.27
21×（9.3－3.7）－5.6 3.65×4.7－36.5×0.37 46×57＋23×86
13.7×0.25－3.7÷4
4、 Practical questions
1. A football costs 46.8 yuan, 1.2 yuan less than three times the price of a volleyball. How much is the price of a volleyball?
2. The young pioneers helped the library to repair 42 books. The first group had 18 people, with an average of 6 books per person. The second group had 12 people, with an average of how many books per person?
3. A and B drive in the opposite direction from city a at the same time. Car a travels 55.5 kilometers per hour and car B 34.5 kilometers per hour. After a few hours, the distance between the two cars is 270 kilometers?
4. Haihong primary school has 1012 students, of which the number of boys is 1.2 times that of girls. How many more boys than girls?
5. The unit price of a pen in the market is 8 times that of a pencil. Xiao Wang paid 15.4 yuan for one pen and three pencils. How much for one pen and one pencil?
6. Mr. Wang planned to use 3-decimeter-long square bricks to build the classroom, which would cost 720 pieces. Later, he used 4-decimeter-long square bricks instead, how many pieces?
7. A car can travel 48 kilometers per hour, 0.7 kilometers more than a bicycle 2.2 times. How many kilometers can a bicycle travel per hour?
8. Party A and Party B build roads from both ends of the 4400 meter long road at the same time. They complete the task in eight days. The number of meters that Party A builds every day is twice that of Party B. how many meters does Party B build every day?
9. The unit price of a pen in the shop is 5.6 times that of a pencil. Li Yang paid 8.28 yuan more for a pen than for a pencil. How much is a pen worth?
10. On the construction site, 8 trucks of cement are transported in the morning, and 11 trucks of cement are transported in the afternoon. In the afternoon, 3180 yuan more cement is paid than in the morning. How much cement is paid in the morning?
11. Wang Hua used 50 yuan to buy 12 exercise books, 1.8 yuan each, and the remaining money to buy 4 pens. How much is each pen?
12. The investment of shuisi Heyuan phase II is 3.86 million yuan, which is 2.5 times less than that of phase I. how much is the investment of phase I?
13. There are 54 students in the painting group, 12 less than that in the dance group. How many students are in the dance group?
14. The area of a trapezoid is 180 square decimeters, its upper bottom is 15 decimeters, and its lower bottom is 21 decimeters. How many decimeters is its height?
(the answer is too many. It's very simple. I can do it with my brain.)
For a project, Party A will complete it in 20 days, and Party B will complete it in 30 days. Now if Party A does one third of the work, Party B will complete the rest, and Party B will do it
How many days? Urgent_
Second, what should we do
(1-1 / 3) × 30 = 20 days
For a project, team a will complete it in 20 days and team B will complete it in 30 days. If team a completes one third of the project alone, team B will join the cooperation. How many days will it take to complete the rest of the project
A efficiency 1 / 20
B efficiency 1 / 30
Therefore, the cooperation efficiency of Party A and Party B is 1 / 20 + 1 / 30 = 1 / 12
It will take X more days
Then 1 / 3 + X / 12 = 1
x/12=2/3
x=8
So it's another eight days
It takes 20 days for a project to be completed by Party A alone, 30 days for Party B alone, 8 days for Party A alone, 3 days for Party B alone, and the rest two people work together
How many more days?
1 divided by 30 = 1 / 30
1 divided by 20 = 1 / 20
1-8x1/20=12/20
12/20-1/30x3=1/2
1 / 2 / (1 / 20 + 1 / 30) = 6 days
A: it will take six days
I hope my answer will help you!
Mathematics is a job, a alone to do 20 days to complete, B alone to do 30 days to complete. 1, a first do three days, B do five days, a total of how much of this work?
2. A, B and do 4 days, how many parts have not done?
3. How many more days will it take for Party A to do it for five days and Party B to do it?
4. A, B and do 6 days, B something to leave, how many days to complete?
5. How many days will it take for Party A to finish the rest of the work?
1. How many days does a and B have to finish the work first
A project is completed in 20 days by Party A alone and 30 days by Party B alone. Now it is done by two people. In the middle of the project, Party A takes a day off first, and Party B takes 6 days off. When the project is completed, how many days have they worked at the same time?
(1 + 120 + 130 × 6) △ 120 + 130) - 1-6 = (1 + 120 + 15) △ 112-1-6 = 54 △ 112-1-6 = 15-1-6 = 8 (days) a: they worked for 8 days at the same time
It takes 20 days for Party A to complete a project alone, and 30 days for Party B to complete it alone. Now in the process of cooperation, Party A has a rest
2 and 1 / 2 days. Party B took a day off, which is 2 days later than the expected date. Ask Party B how many days off he asked for
Booking time = 1 / (1 / 20 + 1 / 30) = 1 / (5 / 60) = 12 days;
Actual days = 12 + 2 = 14 days;
The rest days of B = 14 - (1 - (1 / 20) * (14-2-1 / 2)) / (1 / 30) = 14 - (1 - (1 / 20) (23 / 2)) / (1 / 30) = 14 - (17 / 40) / (1 / 30) = 14-51 / 4 = 14-12-3 / 4 = 5 / 4 days;
So B took one and a quarter days off
A project, a alone to do 20 days to complete, B alone to do 30 days, two people work together, B because of illness, half-way rest, 16 days to complete, B rest for a few days
Let's use the equation to suppose that a has rested for X days, because a's speed is 1 / 20, and he has worked for 16 days. So it's 1 / 20 * 16. Because a's speed is 1 / 30, he has worked for (16-x) days. So it's 1 / 30 * (16-x). Take the total amount as the unit "1". So we can formulate the equation: 1 / 20 * 16 + 1 / 30 * (16-x) = 14 / 5 + 8 / 15 - 1 / 30x
For a project, Party A needs 20 days to complete and Party B needs 30 days to complete. In the joint work, Party A has five days off. How many days will it take to complete the whole project?
(1-130 × 5) △ 120 + 130 + 5 = 56 △ 112 + 5, = 10 + 5, = 15 (days); answer: it takes 15 days to complete the whole project
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