5 times 9 + 15 divided by 3-2 = 18, parentheses make the equation true

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• 1. 7 * 9 + 12 / 3-91 makes the equation true with brackets
• 2. 7 × 9 + 12 △ 3 = 91 and brackets make the formula true
• 3. What is minus 91 divided by 13?
• 4. What is 91 divided by seven eighths?
• 5. How many mushrooms is 360 divided by 38
• 6. What is five divided by minus five
• 7. What is minus 10 divided by minus 5?
• 8. What is minus two divided by minus two?
• 9. What is 2.63 divided by minus 13 and multiplied by minus 25.1
• 10. What is 10 divided by minus 2.5
• 11. Add brackets to the following formula to make the equation hold. 7 × 9 + 12 △ 3-2 = 23
• 12. How does 7 * 9 + 12 / 3-2 equal 47, with brackets, 7 * 9 + 12 / 3-2 equal 75 90-60/15+5*9=41,90-60/15+5*9=47
• 13. Add parentheses at appropriate positions to make the equation true. The first 7 times 9 + 12 divided by 3-2 = 75, the second 7 times 9 + 12 divided by 3-2 = 89 It doesn't matter
• 14. 28 times 560 plus 44 times 12.8 and 2.5 times 3.2 times 12.5 are calculated by simple method
• 15. A simple method to calculate 12.5 times 7.8 times 0.8
• 16. A simple method to calculate 5 plus 95 times 28
• 17. The sum of 12.5 times 40 plus 0.7 is fast with a simple method
• 18. 14 times 34 plus 6. 28 times 23 plus 1. 57 times 40
• 19. Simple calculation. 9.6 times 28.5 plus 0.285 times 40
• 20. Simple calculation method 9.6 * 28.5 + 0.285 * 41