© 2009 -2011 tutorco.com 1 Choose the correct answer: Q1. Round off to the nearest whole number. a) 5 b) 6 Q2. Round off to the nearest whole number. a) 7 b) 8 Q3. A water bottle holds about 23 ounces of water. Estimate the amount of water in 2 bottles. (Round off to nearest 10’s) a) 40 b) 50 5/1/2/S 1 2 3 4 5 6 7 8 9 10 11 12 13 1 2 3 4 5 6 7 8 9 10 11 12 13 GRADE 5 TOPIC: NUMBER SYSTEM © 2009 -2011 tutorco.com 2 Q4. Tom eats one hamburger having 175 calories and French fries having 220 calories. Estimate about how many calories he has eaten. (Round off to nearest 100’s) a) 200 + 200 calories b) 100 + 200 calories Q5. Steve wants to buy a new bat and baseball. The bat cost $33 and baseball cost $16. Estimate what they will cost him altogether. (Round off to nearest 10’s) a) $30 + $10 b) $30 + $20 Q6. When Sam finished bowling, his score was 125. Terry finished with 167 points. Estimate how many more points Terry scored. (Round off to nearest 100’s) a) 50 b) 100 Q7. Round off to the nearest 10’s using the number line. 30 35 40 a) 38 b) 33 c) 36 © 2009 -2011 tutorco.com 3 Q8. Round off to the nearest 100’s using the number line. 500 550 600 a) 543 b) 578 c) 555 Q9. Round off to the nearest 1000’s using the number line. 6,000 6,500 7,000 a) 6,006 b) 6,720 c) 6,498 Q10. Round off to the nearest 10,000’s using the number line. 20,000 25,000 30,000 a) 27,567 b) 24,009 c) 26,999 © 2009 -2011 tutorco.com 4 Q11. Round off to the nearest tens: a) 8 b) 74 c) 35 Q12. Round off to the nearest hundreds: a) 53 b) 247 c) 470 Q13. Round off to the nearest tens. a) 32 a) 77 b) 458 © 2009 -2011 tutorco.com 5 Q14. Round off to the nearest thousands: a) 610 b) 3,502 c) 5,742 Q15. Round off to the nearest ten thousands: a) 71,623 b) 25,105 c) 81,299 Q16. Round to the place of the underlined digit: a) 86 b) 315 c) 44,378 © 2009 -2011 tutorco.com 6 Q17. Round off to the nearest thousands: a) 364,999 b) 600,003 c) 499,234 Q18. Round off to the nearest hundreds: a) 2,354,678 b) 8,456,093 c) 5,342,109 Q19. Round off to the nearest ten thousands: a) 17,635,860 b) 87,354,821 c) 29,002,732 Q20. Round off 599,512 and 8,482 to nearest thousands. © 2009 -2011 tutorco.com 7 Q21. Round to the place of the underlined digit: a) 69,622,009 = b) 15,692 = c) 181,056,518 = d) 2,810,274 = Q22. Each number is rounded to the nearest hundred. Fill in the missing digit to make the statement true. a) 16__ round to 200 b) 5__9 round to 500 c) __30 round to 400 d) 2,708,6__8 round to 2,708,600 Q23. Round off to the nearest hundreds: a) 732,746,521 b) 499,243,421 c) 198,357,498 Q24. Round off to the nearest thousands: a) 4,637,823,003 b) 7,374,812,432 c) 5,478,390,801 © 2009 -2011 tutorco.com 8 Q25. Round off 43, 97 and 256 to the nearest tens. After rounding off, add them. Q26. Round off 732, 164 to the nearest tens. Find the difference of the rounded off numbers. Q27. Round off 543, 698 and 173 to the nearest hundreds. After rounding off, add them. © 2009 -2011 tutorco.com 9 Q28. Round off 602 and 399 to the nearest hundreds. Find the difference of the rounded off numbers. Q29. Round off 56 and 313 to the nearest tens. After rounding off, add them. Round off the sum to the nearest hundreds. Q30. Round off 645 and 229 to the nearest tens. Find the difference of the rounded off numbers. Round off the difference to the nearest hundreds.