Simple calculation of 9.68 - (2.9-0.32)

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• 1. 13.7-9.9 =? And 2.7 - (0.32 + 0.68) =? (need simple calculation) Help me to write it to me with the calculation of stripping!
• 2. Simple calculation of 9.9 * 9.9 + 0.9
• 3. 5×｛（68.41-32.17）÷0.4｝
• 4. Simple operation: 15.32 * 4 + 4.68/0.25
• 5. Simple calculation of 5.68 × 4 + 4.32 △ 0.25
• 6. The simple calculation of 68 * 32 / 34 + 789 is 52 * 84 + 17 * 52 - 52 It is a simple calculation of 68 * 32 / 34 + 789 and 52 * 84 + 17 * 52 - 52
• 7. 18 and 1 / 4 * (1-54 / 59) - 17 and 1 / 4 △ 11 and 4 / 5 Simple calculation
• 8. In 1.5, 5, 0, 18, 19, 80, 51 and 2.4, integers have______ Prime numbers have______ The existence of both odd and composite numbers______ ；______ Yes______ The divisor of
• 9. In 1.5, 5, 0, 18, 19, 80, 51 and 2.4, integers have______ Prime numbers have______ The existence of both odd and composite numbers______ ；______ Yes______ The divisor of
• 10. What are odd numbers 1, 5, 7, 52, 16, 120, 19, 35, 97, 11, 80? Which are odd, even, prime, composite?
• 11. How can 2.9 * 2.9 + 2.9 * 6.1 + 2.9 be easily calculated?
• 12. How to write 9.9 × 6.4
• 13. (1 / 3-1 / 4) △ 1 / 8 + 5 / 6 8-5 / 9-9 / 1 * 4 (1 / 2-1 / 3 + 1 / 6) * 24 4 / 9 △ 4 / 5 - (1 / 5 + 1 / 3)} simple operation
• 14. Simple operation of 3.2 times 9.4 plus 68 times 0.06 All brothers and sisters, please, class will begin tomorrow!
• 15. How much is 9 out of 20 times 199 + 9 out of 20? It's a simple operation! Beauties help
• 16. Calculation: 1-2 / 5 + 3 / 5 =? 8.1 + 1 / 4 =? (1 / 4 + 1 / 3) × 24 =? 24 ／ 3 / 4 =? 0.2-1 / 5 =? 1 ／ 3 / 2 × 2 / 3
• 17. Simple calculation of 105-7 / 0.16 * 0.24
• 18. 24 × 105 =? Simple calculation,
• 19. Simple calculation 3 * 7 * 47 * 2 * 89 * 53 * 4
• 20. Simple calculation of 46 × 21-86