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

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• 1. 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
• 2. 123456789 each number can only be used once. After addition and subtraction, it is equal to 5,
• 3. 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
• 4. How do four numbers 1, 3, 5 and 9 equal to 24?
• 5. 9 11 2 3 how to use addition and subtraction to divide four numbers is equal to 24
• 6. -What is 1 / 3 + 3 / 4-5 / 6 + 1 / 2?
• 7. With a "+" two "-" and a bracket, and without changing the numerical order, connect the nine numbers 1, 2, 3, 4, 5, 6, 7, 8 and 9 into the formula with the result of 100
• 8. It is only allowed to add two '-', one '+' and one bracket. It does not change the order of the numbers, and connects the nine numbers 1, 2, 3, 4, 5, 6, 7, 8 and 9 The formula of the result is 100: 1 23 4 5 6 7 8 9 = 100 fast
• 9. Observe the group of numbers 3 ~ 8, do not change the order of the numbers, add the operation symbols, and make these numbers into a formula, so that the result is equal to 27
• 10. Observe the numbers 3, 3, 8 and 8. If you don't change the numbers smoothly, add the operation symbols and form a formula to make the result equal to 27
• 11. 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
• 12. 12 * 46 () is equal to 64 * 21 It's solved by equation.
• 13. 123456789 how to use addition and subtraction to make it equal to 100
• 14. 2.3.1 horizontal, vertical and oblique are equal to 8.1, and the numbers are not repeated
• 15. 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
• 16. 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?
• 17. 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
• 18. 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
• 19. 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
• 20. Fill in the box with numbers 1 to 9, which cannot be repeated □/□=□/□=□□□/□□ □/□=□/□=□□□/□□ □+□=□ □-□=□ □*□=□ □+□=□ □-□=□ □*□=□