Rounding, estimation, and approximation: แบบฝึกหัด

Round the number 45,982 to the nearest thousand.

A school has \(1,245\) students. If the school plans to distribute notebooks such that each student receives \(12\) notebooks, estimate the total number of notebooks required by rounding the number of students to the nearest hundred and the number of notebooks per student to the nearest ten.

A rectangular plot of land has a length of \(12.48\text{ m}\) and a width of \(8.52\text{ m}\). By rounding each dimension to the nearest whole number, estimate the area of the plot.

Round the number \(63,284\) to the nearest ten thousand.

A rectangular plot of land has a length of \(15.4\text{ m}\) and a width of \(9.6\text{ m}\). By rounding each dimension to the nearest meter, find the estimated area of the plot.

A box of biscuits weighs \(347\text{ g}\). Round off this weight to the nearest ten and the nearest hundred. What is the difference between these two rounded values?

The length and width of a rectangle are measured as \(12.4\text{ cm}\) and \(8.7\text{ cm}\) respectively, both rounded to the nearest \(0.1\text{ cm}\). What is the difference between the maximum possible area and the minimum possible area of the rectangle, rounded to two decimal places?