2.3.1 horizontal, vertical and oblique are equal to 8.1, and the numbers are not repeated

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• 1. 123456789 how to use addition and subtraction to make it equal to 100
• 2. 12 * 46 () is equal to 64 * 21 It's solved by equation.
• 3. Add appropriate operation symbols or brackets to the left of the equal sign of the following questions to make the result exactly equal to the number 4 = 20 on the right 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6=1996
• 4. Add appropriate operation symbols and brackets to the left of the equal sign of the following questions to make the calculation result exactly equal to the number on the right 5-5-5-5=0 5○5○5○5=1 5○5○5○5=2 5○5○5○5=3 5○5○5○5=10 5○5○5○5=30 5×5×5×5=100 5○5○5○5=150 Wrong 5○5○5○5=0 5○5○5○5=1 5○5○5○5=2 5○5○5○5=3 5○5○5○5=10 5○5○5○5=30 5○5○5○5=100 5○5○5○5=150
• 5. Add appropriate budget symbols and brackets to the left of the equal sign of the following questions to make the calculation result exactly equal to the number on the right 3（）3（）3（）3= 5 3（）3（）3（）3= 6 3（）3（）3（）3= 7 3（）3（）3（）3=8 3（）3（）3（）3= 2 3（）3（）3（）3= 4
• 6. 123456789 each number can only be used once. After addition and subtraction, it is equal to 5,
• 7. The sum of a two digit one digit number and a ten digit number is greater than 10. If 36 is added to the two digits, it is exactly equal to the two digits after the exchange of two digits Find the original two digits, using inequality solution
• 8. How do four numbers 1, 3, 5 and 9 equal to 24?
• 9. 9 11 2 3 how to use addition and subtraction to divide four numbers is equal to 24
• 10. -What is 1 / 3 + 3 / 4-5 / 6 + 1 / 2?
• 11. Fill in the box with 12345678 so that the sum of the three numbers on each line equals 15 There is no need to fill in the middle square
• 12. 1, 3, 5, 7, 9, 11, these six numbers are filled in the square, so that the sum of three numbers on each line is equal to 15?
• 13. Will 1.2.3 These nine numbers are filled in the nine squares of the square so that the sum of the numbers in each row, column and three squares on the diagonal line is equal to 15? In the lattice of a 3 × 3 square □□□ □□□ This is in a square Just tell me what it is. Better give me the formula. I'll give it to whoever tells me
• 14. Do not repeat the nine numbers 1-9 in the box below, Do not repeat the nine numbers 1-9 in the box below （1）□□×□=□□ □×□=□□ （2）□□÷□=□ □÷□=□□÷□ The nine numbers of 1-9 in each question can't be repeated
• 15. Put the nine numbers 1 ~ 9 in the following box (without repetition or omission) so that the sum of the three numbers in each horizontal, vertical and horizontal direction is equal. Given that the position of number 8 is (3,1), write other numbers 3 □□□ 2 □□□ 1 □□8 1 2 3
• 16. Fill in the box with numbers 1 to 9, which cannot be repeated □/□=□/□=□□□/□□ □/□=□/□=□□□/□□ □+□=□ □-□=□ □*□=□ □+□=□ □-□=□ □*□=□
• 17. Fill 1 to 9 in the box respectively, the equation holds, and the number is not repeated □ ^ ^ ^ ^ = □ × ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^
• 18. Fill in the box below with 1-9 numbers, which can't be repeated. Division is equal to division = () division = 2
• 19. Fill the numbers 1 to 9 in the small boxes so that the sum of the three numbers on each line is equal to 15
• 20. Vertical and horizontal nine grid, 1 ~ 9, nine numbers filled in the grid, so that the horizontal, vertical, oblique addition is equal to 15, can not be repeated, I want to answer in detail! I only need the detailed answer, how to solve it ~ don't just give me the answer, I will search for the answer myself!