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Fill 1.2.3.4.5.6.7.8.9 in () respectively to make the equation hold. (each () can only be filled with one number, and the number in each question is not correct.) 1,（）+（）=（） （）-（）=（） （）*（）=（） 2, () + () - () = () * () divided by () = () () 3,（）*（）=（）（） （）+（）-（）=（）（） 4,（）（）（）-（）（）（）=（）（）（1）
1,（1）+（7）=（8） （9）-（4）=（5） （2）*（3）=（6）
2, (5) + (4) - (7) = (2) (9) * (6) divided by (3) = (1) (8)
3,（6）*（9）=（5）（4） （7）+（8）-（2）=（1）（3）
4,（6）（7）（5）-（2）（8）（4）=（3）（9）（1）
Put the ten numbers 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9 into the small box below to make the three equations hold
In the multiplication formula, the product must be an integral ten, which can be 2 × 5 = 10, 4 × 5 = 20, 6 × 5 = 30, 8 × 5 = 40; suppose 2 × 5 = 10; there are 3, 4, 6, 7, 8, 9 left; these six numbers cannot form an addition formula and a subtraction formula, so the multiplication formula is not 2 × 5 = 10; suppose 4 × 5 = 20
Fill 1 ~ 9 in the box below to make the equation true, and the number can't be repeated
I'll give you the answer
Is multiplication or division used to find how many times a number is another number
Division
What's the relationship between division and multiplication
They are reciprocal operations
Xiao Hong calculates a division problem. She mistakenly takes the divisor 52 as 32. The result shows that the quotient is 1.3, and the correct quotient is ()
Solution: 1. Let's make mistakes. First, calculate the divisor of the division formula: 1.3 * 32 = 41.6
2、 After knowing the divisor, divide the divisor by the correct divisor to get the correct quotient: 41.6/52 = 0.8
When calculating the division, X Xiaohong writes the divisor 72 as 27, and the quotient 26 is more than 18?
The divisor is 27, the quotient is 26, and the remainder is 18
Divisor = divisor * quotient + remainder = 27 * 26 + 18 = 720
Since the divisor is known, we only need to change the divisor from 27 to 72
720/72=10
So the correct answer is 10!
Xiao Hong does a division problem. She takes the divisor 36 as 63 and gets a quotient of 14 over 18. What's the correct quotient? I want to calculate
Xiao Hong does a division problem. She takes the divisor 36 as 63 and gets a quotient of 14 over 18. What's the correct quotient? I want to calculate
（63×14+18）÷36=25
Xiao Ming wrote the divisor 1350 as 1305 when he calculated the division. The result shows that the quotient is 52 and the remainder is 5. The correct quotient should be 5______ ．
(1305-5) △ 52, = 1300 △ 52, = 25; 1350 △ 25 = 54; answer: the correct quotient is 54; so the answer is: 54
Xiaohong and Xiaoqiang start from home at the same time. Xiaohong walks 52 meters per minute and Xiaoqiang 70 meters per minute. They meet at a on the way. If Xiaohong starts 4 minutes ahead of schedule and Xiaoqiang walks 90 meters per minute, they still meet at a. how many meters are Xiaohong and Xiaoqiang's homes apart?
Originally, the speed ratio of Xiaohong and Xiaoqiang was 52:70 = 26:35, then Xiaoqiang walked the whole course when they met: 35 ÷ (26 + 35) = 3561; later, the speed ratio of Xiaohong and Xiaoqiang was 52:90 = 26:45, when they met, Xiaoqiang also walked the whole course of 3561, then Xiaohong walked the whole course after Xiaoqiang started 3561 × 2645 × = 182549; the distance between Xiaohong's and Xiaoqiang's houses: (52 × 4) / (1-3561-182549) = 208 × 54952, = 2196 (m). A: the distance between Xiaohong's and Xiaoqiang's houses is 2196 M
RELATED INFORMATIONS
- 1. Put the nine numbers 1 to 9 in the box to make the equation hold. (each number can't be repeated.)
- 2. Fill the seven numbers 0-6 in () of the following formula respectively, and each () can only fill in one number, so that the formula is valid and the numbers are not repeated ( )x( )=( )( )÷( ) =( )( )
- 3. Fill in 2,4,6,8 in the appropriate box according to the requirements, and only fill in one number in each box without repetition. Thank you very much
- 4. Vertical and horizontal nine grid, so that the horizontal, vertical, oblique addition is equal to a sum, can not be repeated Nine numbers from 1 to 9
- 5. 1-8, fill in the box with 8 numbers, so that the sum of each side is equal to 15
- 6. Can the recursive equation 14.7 × 0.56-5.7 × 0.56 + 5.6 be calculated skillfully? If so, please list the formula
- 7. Fill in the number of 1-9 without repetition in the box □ × □ = □, □ + □ - □ = □
- 8. There are +. -. × in the number composition square of 123456789 [each number cannot be repeated] □－□＝□ × □ ÷ □＝□ ＝ □＋□＝□
- 9. () × () = () () = () × () () () fill in 1 ~ 9 numbers, which cannot be repeated
- 10. 1-9 nine non duplicate numbers are filled in [] [] *] =] [] [] *] =] [] [] Make sure that it's original. Here is the empty one. It's two formulas with nine different numbers. Thank you for your work. There's another division to get rid of, () () / () = (), () / () = （）（）/（）
- 11. Fill in 9 numbers from 1 to 9 to make the equation hold, and the numbers are not repeated: □ □ * □ = □ * □ = 5568 Be quick! You have to be right!
- 12. How can two 10's and two 4's be equal to 24? We have to add, subtract, multiply and divide, but we must use these four numbers, not less or more
- 13. Add, subtract, multiply, divide or square four numbers (all four numbers can only be used once). You can add brackets to make the result equal to 24. Please use three Different algorithms make the operation result of four rational numbers 3, - 4, 6 and 10 equal to 24. Please write the formula?
- 14. 3.4.1.6 how to calculate? It is equal to 24 in the end and can't repeat a number emergency
- 15. There are nine digits 1, 2, 3, 4, 5, 6, 7, 8, 9, and they can be combined into the equation □ - □ = □ - □ = □ - □ - the number can't be repeated It's a minus sign
- 16. In 123456789, choose any four digits to form a four digit number, and multiply one of the digits by the other four digits
- 17. Fill in the brackets of the following formula with appropriate numbers to make it true （）（）（） × 8 9 —————————— （）（）（）（） 8 （）（） ——————————— （）（）（）（）
- 18. A three digit number is not only a multiple of 3, but also a multiple of 5. The number on the ten digit number is the smallest prime number, and the number on the hundred digit number is the multiple of the ten digit number
- 19. A 3-digit number is a multiple of 2.3.5, and the number in the 100 digit number is 7 larger than that in the 10 digit number. What is the number?
- 20. Is π - 3.14 equal to 0? Brother's math problem is a little difficult. This π is 3. If it is, why don't you give us 3.14 directly