rewrite the following calculations, correcti g each number to onr significant figure then use this to make a rough estimate. 1. 199x299 2. 62.3x60 3. 49.7x4.04 4. 31.6 divide by 8 5. 0.923x0.321 6. 727+846+970+649 7. 987-293 8. 2.67 divide by 30.3 9. 74729 + 88217 10. 16.875x3.025 11. 48.3 x 66 12. 8.95x1.125x7.5 13. 5371 divide 896 14. 68.375 15. 75.9 divided by 187.1 16. 8773+7249+627 17. 6.985x6.985 18. 3.44x0.303 19. 6.924 divide by 99 20. 3.125x36.47x8.11