End of Year 7th Grade Math Trivia

Front

What is a scale image in mathematics?

Back

A scale image is a representation of an object that is proportionally larger or smaller than the actual object, maintaining the same shape.

Front

If 2.5 centimeters on a map represents 15 kilometers, how do you find the actual distance represented by a different measurement?

Back

Use the ratio: (actual distance) = (map distance) x (15 km / 2.5 cm).

Front

Order the following numbers from least to greatest: -61, -21, -40, -85.

Back

-85, -61, -40, -21.

Front

What does it mean to hold 75% less of a quantity?

Back

It means the new quantity is 25% of the original quantity.

Front

How do you calculate percent decrease?

Back

Percent decrease = [(original value - new value) / original value] x 100.

Front

What is the value of x if Figure A is a scale image of Figure B and x is determined by the scale?

Back

x is the value that maintains the proportional relationship between Figure A and Figure B.

Front

If a bottle holds 12 fluid ounces and another holds 75% less, how much does the second bottle hold?

Back

The second bottle holds 3 fluid ounces.

Front

What is the formula to convert centimeters on a map to kilometers in reality?

Back

(map distance in cm) x (actual distance in km / scale in cm).

Front

How do you determine the order of negative numbers?

Back

Negative numbers are ordered by their absolute values; the number with the largest absolute value is the smallest.

Front

What is the percent decrease if a pumpkin's mass goes from 6.5 kg to 3.9 kg?

Back

The percent decrease is 40%.