G5-16-3&5-16-4

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1.When finding the percentage of pupils going to school by MRT train from a pie chart, what is the key reasoning?（）

A)Add all other sectors' percentages and subtract from 100% even when the MRT sector is clearly a quarter.B)Randomly guess a percentage without analyzing the sector.C)Recognize the sector for MRT train is a quarter (1/4), so calculate 100% ×1/4= 25%.D) Use the total number of pupils directly as the percentage.

2. To find the number of students preferring each beverage from a pie chart, what is the correct approach?（）

A)Multiply the total number of students by each beverage's percentage.B)Add all percentages and divide by the total number of students.C)Ignore the percentages and count the number of students visually.D)Use the percentage of one beverage as the number of students.

3.When determining the total number of students in Emma’s class from a pie chart, what is the crucial step?（）

A)Assume the total number is the same as the known group's number.B)First find the percentage of the known group, then set up an equation:Total×Percentage= Known Number, and solve for Total.C)Add all sector percentages and multiply by the known group's number.D)Use the percentage of one activity as the total number of students.

4. For finding Lucas’s total holiday expenses given transportation cost is $1,560, what is the key step?（）

A)Add all other expenses' percentages and use that as the total.B)Divide the transportation cost by its percentage directly without setting up the equation.C)Use the percentage of shopping as the total expenses.D)Set up the equation:Total Expense× 26% = $1,560, then solve for Total Expenses.

5.When finding the sales of brand B candies using both a bar chart and a pie chart, what is the correct process?（）

A)First find the total sales using brand A’s sales and its percentage from the pie chart, then subtract brand A and C’s sales from the total.B) Use brand B’s bar height directly as its sales without considering the pie chart.C) Assume brand B’s percentage from the pie chart is its sales.D) Add brand A and C’s sales and use that as brand B’s sales.

6.To complete statistical charts for students’ favorite book genres using both a bar chart and a pie chart, what is the essential approach?（）

A)First determine the total number of students using the comic genre’s bar and its percentage, then calculate other genres’ numbers and percentages.B) Ignore the pie chart and only use the bar chart.B)Use the percentage of one genre as the number of students.C)Randomly assign numbers to each genre.

1. What is the key step in finding the circumference of a sector?（）

A) Use the circle circumference formula directly, ignoring the sector’s angle.B) First calculate the arc length using x°/360°×2πr, then add the lengths of the two radii.C) Only calculate the arc length and ignore the radii.D) Randomly choose a value.

2.What is the correct method to find the percentage of a part in a pie chart?（）

A) Ignore the angle and estimate a percentage randomly.B) Use the angle directly as the percentage.C) Add all angles and divide by 360°.D) Divide the angle of the part by 360°and convert it to a percentage.

3. When finding the number of students who chose running from a pie chart, what is the first step?（）

A) First calculate the percentage of running (by subtracting other categories’ percentages from 100%), then multiply by the total number of students.B) Directly multiply the total number of students by any percentage.C) Visually estimate without considering percentages.D) Add all percentages and multiply by the total number of students.

4.When solving the problem of finding the number of failed students using both a bar chart and a pie chart, how should you proceed?（）

A) Multiply the total number of students by the “Excellent” percentage from the pie chart.B) Directly read the number corresponding to “Fail” from the bar chart.C) Add all numbers in the bar chart and divide by 2.D) Ignore the charts and guess randomly.

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