01. Two stacks of newspapers are placed next to each other. Stack B has 10 newspapers. Stack A is exactly four times the height of Stack B. Estimate the number of newspapers in Stack A. 10
Correct Answer: 40
02. A glass container is filled with marbles. After 16 marbles are sold, the empty space is approximately 1/7th of the total volume of the container. Estimate the total number of marbles there were initially. 10
Correct Answer: 112
03. What is the best definition for estimation in mathematics? 5
04. 11 books fit exactly into one compartment of a book rack. If there are 5 identical compartments, estimate the total books required to fill the rack by rounding 11 to the nearest ten first, then multiplying. 5
Correct Answer: 50
Unit Test: Estimation & Rounding
smartmathsacademy.com
Time Left30:00
Part II: Rounding Off (35 Marks)
05. Round off 78 to the nearest multiple of ten. 5
06. Round off 35 to the nearest multiple of ten. 10
Correct Answer: 40
07. Round off 53 to the nearest multiple of ten. 10
Correct Answer: 50
08. The price of a piece of cheese is Rs 75. What is this price when rounded off to the nearest multiple of ten? 10
Correct Answer: 80
Unit Test: Estimation & Rounding
smartmathsacademy.com
Time Left30:00
Part III: Application and Logic (35 Marks)
Correct Answer: 85
Correct Answer: 44
11. Iresha's marks rounded off to the nearest ten is 70. Niromi got 67 marks, which is MORE than Iresha. What is a possible exact mark Iresha received? 5
