Write 0 1 2 4 5 6 7 8 9 into three formulas (one addition, one subtraction, one multiplication). Each number is only used once. How can we solve it
2x3=6
0+1+7=8
9-4=5
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- 1. Fill in 0123456789 in the box. Each number can only be used once. Think of at least four formulas
- 2. 0123456789 ten numbers are listed in one formula. All numbers can only be used once
- 3. Use 0123456789 ten numbers to form two five digit numbers, how to combine the product to the maximum? Why does 96521 * 87430 have the largest combined product? Please explain the reason of this combination.
- 4. With 0, 1, 2 The ten numbers, 9, constitute a four digit number, a three digit number, a two digit number and a one digit number. Each number can only be used once, so that the sum of the four numbers equals 1998, then the minimum value of the three digits is______ .
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- 7. Fill in 10 numbers of 0123456789 in (), each number can only be used once () + () = () - () = () - () = () - () = () - () = ()-(
- 8. Fill in 10 numbers 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 in □, and each number is used only once
- 9. Fill in the ten numbers 0123456789 in (). Fill in each number once. () + () = (), () - () = (), () times 9 () = ()
- 10. What multiplication formulas can I write with 2, 3, 5, decimal point and multiplication sign
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- 12. How many five digit numbers can be made up of six numbers 1, 2, 3, 4, 5 and 6? 6*5*4*3*2*1=720 Why should we multiply the number without repetition from 6 to 1? What is the meaning of multiplication here? Please help me understand deeply
- 13. Among the three digit numbers without repetition composed of numbers 1, 2, 3, 4, 5 and 6, the number that is a multiple of 9 is () A. 12 B. 18 C. 20 D. 30
- 14. How many four digit numbers can be made up of numbers 0, 1, 2, 3 and 4
- 15. With the four numbers of 2, 3, 4 and 5, many four digit numbers without repetition can be formed. What is the sum of all these four digit numbers
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- 17. Use 0,1,2,3.9 to form an addition vertical, and the numbers can't be used repeatedly
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