1+7=8

7-4=3

3×8 = 24

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Tips for quickly calculating 24 points

Thinking of solving problems: 3×8=24, 4×6=24, 12×2=24.

Try to sum the four numbers on the card face into 3 and 8, 4 and 6, and then multiply them to solve. For example, 3,3,6, 10 can form ×3=24, for example, 2,3,3,7 can form ×3=24. This method is the one with the largest usage rate and the highest hit rate.

Example: 1555 is 24 points.

Interpretation and analysis: In this formula, the number that appears is "1, 5,5,6" required in the title. If you calculate the number in brackets first, you will get 4.8, and then multiply it by 5 to get 24.

Extended data:

Specific gameplay at 24 o'clock:

The specific way to play blackjack is to take a deck of cards, remove the queen and the queen, leaving 40 cards of 1 ~ 10, and replace A with 1.

Randomly draw 4 cards, and calculate the number on the card face into 24 by addition, subtraction, multiplication and division. Each card can only be used once. If the cards drawn are 3, 8, 8 and 9, then the formula is ×8×3=24.

24 points in the third grade, 100.

3456:)×6)=24

3457:)×4)=24

3458:)×8)=24

3459:)×3)=24

345 10:)× 10)=24

3466:)-6)=24

3468:)×4)=24

3469:)×4)=24

346 10:)+6)=24

3477:)-7)=24

3478:)+8)=24

3479:)-9)=24

347 10:)+ 10)=24

356 10:)+ 10)=24

3578:)+3)=24

3579:)+9)=24

357 10:)×3)=24

3588:)+8)=24

3589:)-8)=24

3599:)+9)=24

359 10:)+9)=24

3489:)+9)=24

348 10:)×4)=24

3499:)+9)=24 The general process of inquiry begins with finding and asking questions. After finding the question, we assume the answer to the question according to the existing knowledge and life experience. The investigation scheme is designed, including the selection of materials, the design of methods and steps. We query according to the query scheme, get the results, and then analyze whether the results are consistent with the assumptions. So we can draw a conclusion. Not all the questions can be reached at once. Sometimes, due to imperfect investigation methods, wrong conclusions may be drawn. So after reaching the conclusion, we need to reflect on the whole inquiry process. The general methods and steps of inquiry experiment are: asking questions, making assumptions, making plans, implementing plans, drawing conclusions, expressing and communicating.

The common methods of scientific inquiry are observation, experiment, investigation and data analysis.

Observation is the basic method of scientific inquiry. Scientific observation can be made directly with the naked eye, with the help of magnifying glasses, microscopes and other instruments, as well as cameras, video recorders, video cameras and other tools, and sometimes measurement is needed. Scientific observation should have a clear purpose; Observation should be comprehensive, meticulous and realistic, and recorded in time; Planned and patient; Think positively and record in time; It is necessary to exchange views and discuss. The design of the experimental scheme should closely focus on the questions and assumptions raised. When studying the influence of a condition on the research object, experiments with the same conditions except this condition are called control experiments. General steps: find problems and ask questions; Collect information related to the problem; Make assumptions; Design the experimental scheme; Conduct experiments and record them; Analyze experimental phenomena; Draw a conclusion. Investigation is one of the common methods of scientific inquiry. When investigating, we must first make clear the purpose and object of the investigation and make a reasonable investigation plan. Sometimes, due to the large scope of investigation, we must select some objects as samples during the investigation. In the process of investigation, we must record it truthfully. We must sort out and analyze the survey results. Sometimes it is necessary to use mathematical methods for statistics. Collecting and analyzing data is also one of the common methods of scientific inquiry. There are many ways to collect data. Go to the library to consult books, newspapers and periodicals, visit relevant people and collect them online. The forms of data include words, pictures, data and audio-visual materials. It is necessary to sort out and analyze the obtained data, find answers and explore clues.