ERB Mathematics Achievement Practice Test

Front

What is the formula for calculating the perimeter of a rectangle?

Back

P = 2 × (L + W), where L is the length and W is the width.

Front

If there are 8 boys in a class and 4 more girls than boys, how many girls are there?

Back

There are 12 girls in the class.

Front

What is the probability of selecting a specific outfit from multiple clothing items?

Back

Probability = (Number of favorable outcomes) / (Total number of outcomes).

Front

What is the slope of a line perpendicular to a line with a slope of -2/5?

Back

The slope of the perpendicular line is 5/2.

Front

How do you convert a mixed number to an improper fraction?

Back

Multiply the whole number by the denominator, add the numerator, and place over the original denominator.

Front

What is the value of 3 1/5 as an improper fraction?

Back

3 1/5 = 16/5.

Front

How do you find the fraction of a group represented by a subset?

Back

Fraction = (Number in subset) / (Total number in group).

Front

What is the equation of a line in slope-intercept form?

Back

y = mx + b, where m is the slope and b is the y-intercept.

Front

How do you calculate the total number of outfits from different clothing items?

Back

Total outfits = (Number of pants) × (Number of shirts) × (Number of shoes).

Front

What is the formula for finding the area of a rectangle?

Back

Area = L × W, where L is the length and W is the width.