MCA: Number Sense 1

Front

What are coordinates in a coordinate grid?

Back

Coordinates are a set of values that show an exact position on a grid, typically represented as (x, y).

Front

What is a rational number?

Back

A rational number is any number that can be expressed as a fraction where both the numerator and the denominator are integers.

Front

Give an example of a rational number.

Back

0.75 is a rational number because it can be expressed as 3/4.

Front

What is an irrational number?

Back

An irrational number is a number that cannot be expressed as a simple fraction, such as pi (π) or the square root of 2.

Front

How do you identify the quadrant of a point in a coordinate grid?

Back

The quadrant is determined by the signs of the x and y coordinates: Quadrant I (positive, positive), Quadrant II (negative, positive), Quadrant III (negative, negative), Quadrant IV (positive, negative).

Front

What are the coordinates of the origin in a coordinate grid?

Back

The coordinates of the origin are (0, 0).

Front

If a point has coordinates (-2, 3), in which quadrant is it located?

Back

It is located in Quadrant II.

Front

What is the formula to find the missing vertex of a rectangle given three vertices?

Back

Use the properties of rectangles: the x-coordinates and y-coordinates of opposite vertices are equal.

Front

What does it mean for a number to be less than 1?

Back

A number is less than 1 if it is smaller than 1 on the number line, such as 0.5 or -2.

Front

What is the significance of the number 0 in rational numbers?

Back

0 is considered a rational number because it can be expressed as 0/1.