Welcome to your Approximations and Estimations(Study by Topics Junior Class) NAME EMAIL PHONE NUMBER 1. Calculate to 3 s.f 0.175 0.214 0.123 0.311 2. Find the estimated answer by rounding each number in to 1 sf 0.138 0.175 0.327 0.214 3. Correct each of the numbers 38.7152 and 0.05381 to two significant figures and find their product, correct to two significant figures 2.0 2.1 0.21 1.9 4. Calculate the approximate cost of 128 books at N450.50 each 57,500.00 58,000.00 58,500.00 57,664.00 5. Write 3.8451 to 2 decimal places 3.845 3.90 4.00 3.85 6. You want to buy carpet for two rooms. The first is 3.2m by 2.7m. The second is smaller, 1.16m by 2.5m. How much carpet do you need to buy to be sure of having enough for both rooms? 11.09 m² 12.45 m² 12 m² 11.54 m² 7. Write 0.3741 to 2 decimal places 0.37 0.4 0.42 0.374 8. Round off 2.6548 correct to one decimal place. 2.7 2.66 2.65 2.6 3 9. Approximate 12256 to 3 significant figures. 12260 12.3 122 12300 12200 10. The area of a rectangle is 65.69 cm², if the length is 10.12 cm, calculate the width correct to 2 dp 6.50 cm 6.49 cm 5.74 cm 5.59 cm 11. What is 0.021728 to 3 significant figures? 0.021 0.0217 0.022 0.02173 0.0218 12. Calculate correct to 2 d.p 3.7 4.4 4 4.53 13. Find an estimate for √98 6 9.2 10 7.4 14. Find the estimated answers of the equation : 80 87.5 75 77.4 15. Round to the nearest hundredths place:9,765.248 9,800 9,700 9,765.24 9,765.25 16. Express 0.4563948 to three decimal places. 0.457 0.5 0.456 0.4 17. The difference between 0.003286 correct to three significant figures and 0.003286 correct to four decimal places is 0.00001 0.0003 0.000004 0.00009 18. Round to the nearest hundreds place:98, 456 98, 540 98, 460 98, 550 98, 440 19. Evaluate 4512/0.05 correct to three significant figures 9020 90240 90200 902 20. Approximate 0.4059 to 3 significant figures. 0.406 0.4 0.405 0.40 0.41 1 out of 20 Time is Up! Time's up