Grade 7 GMAS Math Review: Day 2

Front

What is a scale in mapping?

Back

A scale is a ratio that compares a distance on a map to the actual distance it represents in real life.

Front

How do you calculate actual distance using a map scale?

Back

Multiply the distance on the map by the scale factor. For example, if the scale is 1 cm = 15 miles and the distance is 16 cm, the actual distance is 16 cm * 15 miles/cm = 240 miles.

Front

What is the result of the expression: (-35 - (-82))?

Back

47

Front

What is the formula for calculating slope between two points?

Back

Slope (m) = (y2 - y1) / (x2 - x1), where (x1, y1) and (x2, y2) are the coordinates of the two points.

Front

How do you find the slope of a line passing through (-2, -4) and (8, 12)?

Back

Using the slope formula: m = (12 - (-4)) / (8 - (-2)) = 16 / 10 = 8/5.

Front

What is simple interest?

Back

Simple interest is calculated using the formula: I = P * r * t, where I is interest, P is principal, r is rate (as a decimal), and t is time in years.

Front

How do you calculate simple interest earned on an account?

Back

Multiply the principal by the rate and the time. For example, for $500 at 5% for 10 years: I = 500 * 0.05 * 10 = $250.

Front

What does complementary angles mean?

Back

Complementary angles are two angles whose measures add up to 90 degrees.

Front

If one angle is 33°, what is the measure of its complementary angle?

Back

The complementary angle is 90° - 33° = 57°.

Front

What is the definition of a negative number?

Back

A negative number is a number that is less than zero, often used to represent a loss or a decrease.