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What double digits can be represented by dialing 6 beads on the calculator?
60、51、15、42、24、33、
Use 5 beads to set 3 digits on the calculator. What's the biggest
900
The first one is up and down and the last two are empty
There are five beads in the calculator to put three digits, the largest is
Up and down 3 = 800 in 100 position, up and down 1 = 50 in 10 position, up to 850
Only when the unknowns in the equation are replaced by the solutions in the equation can the equation represented by the equation hold. Is that right? Why!
Yes, the equation is the process of solving, and the unknown is the solution
If both sides of the equation add (or subtract) the same number, the equation still holds______ (judge right or wrong)
If the same number is added (or subtracted) on both sides of the equation, the equation still holds. This statement conforms to the nature of the equation, so it is correct
If you add or subtract the same number on both sides of the equation, the equation holds. Is it √ or ×
Yes
When solving the equation, it is based on a number on both sides of the equation, and the equation still holds
What's in the brackets?
If you add (or subtract) the same number on both sides of the equation, the equation still holds
How to solve the equation with unknowns on both sides of the equation
When there are unknowns on both sides, move the right one to the left
In the equation 3 × () - 2 × () = 15, fill in a number in the brackets, so that the two numbers meet the conditions respectively; 1. The two numbers are opposite to each other; 2. The sum of the two numbers is 15
3×(3 )-2×(-3 )=15
Put the nine numbers 1, 2, 3, 4, 5, 6, 7, 8 and 9 into the following nine squares, each number can only be used once, so that the equation holds. □ × □ × (□ + □ + □) × (□ + □ -) = 2002
2002 = 2 × 7 × 11 × 13, 9 + 8-6 = 11, 1 + 3 + 4 + 5 = 13, so the answer is: 2 × 7 × (1 + 3 + 4 + 5) × (9 + 8-6) = 2002
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- 11. Dial 5 beads in the counter to indicate which two digits? Write 4
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- 13. There are six beads on the counter, which can show several three digits
- 14. How many are the maximum four digits and the minimum four digits on the counter with five beads?
- 15. Use eight beads to dial out four digits on the counter. What is the maximum number and what is the minimum number?
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