8th Grade Math Worksheets with Answer Sheets Printable

Are you a student or teacher in search of comprehensive 8th grade math worksheets? Look no further! We have just what you need - a collection of carefully crafted worksheets designed to enhance your understanding of various mathematical concepts. With accompanying answer sheets, reviewing and assessing your progress has never been easier.

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What is the value of 5x when x equals 3?

The value of 5x when x equals 3 is 15.

Simplify the expression 2(4x + 5) - 3(x - 1).

The simplified expression is 11x + 13.

Solve the equation 2x + 7 = 15.

To solve the equation 2x + 7 = 15, we first isolate the variable x by subtracting 7 from both sides. This gives us 2x = 15 - 7, which simplifies to 2x = 8. Finally, divide both sides by 2 to solve for x, giving us x = 4. Thus, the solution to the equation is x = 4.

Find the area of a rectangle with width 6 cm and length 8 cm.

To find the area of a rectangle, you simply multiply the length by the width. In this case, the width is 6 cm and the length is 8 cm. Therefore, the area of the rectangle is 6 cm x 8 cm = 48 square cm.

Calculate the perimeter of a triangle with sides measuring 5 cm, 6 cm, and 8 cm.

To calculate the perimeter of the triangle with sides measuring 5 cm, 6 cm, and 8 cm, you would add the lengths of all three sides together. So the perimeter would be 5 cm + 6 cm + 8 cm = 19 cm.

Determine the volume of a rectangular prism with dimensions 4 cm, 5 cm, and 6 cm.

To determine the volume of a rectangular prism, multiply its three dimensions together. So, for a rectangular prism with dimensions 4 cm, 5 cm, and 6 cm, the volume would be 4 cm x 5 cm x 6 cm = 120 cubic centimeters.

Simplify the fraction 3/4 + 1/3.

To simplify the fraction 3/4 + 1/3, you first need to find a common denominator, which is 12 in this case. Then, convert each fraction to have the same denominator: 3/4 becomes 9/12, and 1/3 becomes 4/12. Adding these together gives you 9/12 + 4/12 = 13/12. Therefore, the simplified fraction is 13/12.

Solve the proportion: 5/8 = x/16.

To solve the proportion 5/8 = x/16, we can cross-multiply to get 8x = 5 * 16. Simplifying, we get 8x = 80. Dividing by 8 on both sides gives us x = 10. Therefore, the solution to the proportion is x = 10.

Calculate the percent increase from 40 to 52.

To find the percent increase from 40 to 52, first calculate the difference between the two numbers: 52 - 40 = 12. Then, divide the difference by the original number (40) and multiply by 100 to get the percentage increase: (12/40) * 100 = 30%. Therefore, there is a 30% increase from 40 to 52.

Find the missing angle in a triangle with angles measuring 50° and 80°.

The missing angle in the triangle can be found by subtracting the sum of the given angles from 180°, as the sum of the angles in a triangle is always 180°. So, the missing angle would be 180° - (50° + 80°) = 50°. Therefore, the missing angle in the triangle measures 50°.