Fifth Grade Math Skills Quiz

Answer explanation

To find the sum of \(\frac{1}{4}\) and \(\frac{3}{8}\), convert \(\frac{1}{4}\) to \(\frac{2}{8}\). Then, add \(\frac{2}{8} + \frac{3}{8} = \frac{5}{8}\). The correct answer is \(\frac{7}{8}\).

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Answer explanation

To subtract \( \frac{2}{5} \) from \( \frac{4}{5} \), we calculate \( \frac{4}{5} - \frac{2}{5} = \frac{2}{5} \). Thus, the correct answer is \( \frac{2}{5} \).

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Multiply 6 by 7.

• 42

• 36

• 48

• 49

Answer explanation

To find the product of 6 and 7, multiply the two numbers: 6 x 7 = 42. Therefore, the correct answer is 42.

Tags

CCSS.3.OA.C.7

Divide 56 by 8.

• 6

• 7

• 8

• 9

Answer explanation

To find the result of 56 divided by 8, perform the division: 56 ÷ 8 = 7. Therefore, the correct answer is 7.

Tags

CCSS.4.NBT.B.6

Which of the following numbers is a prime number?

• 9

• 15

• 17

• 21

Answer explanation

A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself. Among the choices, 17 is prime, as it can only be divided by 1 and 17, while 9, 15, and 21 have other divisors.

Tags

CCSS.4.OA.B.4

Identify the composite number from the list below.

• 2

• 3

• 5

• 12

Answer explanation

A composite number has more than two distinct positive divisors. Among the choices, 12 is composite (divisors: 1, 2, 3, 4, 6, 12), while 2, 3, and 5 are prime numbers.

Tags

CCSS.4.OA.B.4

Calculate the area of a rectangle with a length of 8 units and a width of 3 units.

• 11 square units

• 24 square units

• 16 square units

• 20 square units

Answer explanation

To find the area of a rectangle, multiply the length by the width. Here, area = 8 units * 3 units = 24 square units. Therefore, the correct answer is 24 square units.

Tags

CCSS.3.MD.C.7B

CCSS.4.MD.A.3

What is the perimeter of a square with side length 5 units?

• 10 units

• 15 units

• 20 units

• 25 units

Answer explanation

The perimeter of a square is calculated by the formula P = 4 × side length. For a square with a side length of 5 units, P = 4 × 5 = 20 units. Therefore, the correct answer is 20 units.

Tags

CCSS.4.MD.A.3

Which term describes a triangle with all sides of different lengths?

• Equilateral

• Isosceles

• Scalene

• Right

Answer explanation

A scalene triangle is defined as having all sides of different lengths. In contrast, an equilateral triangle has all sides equal, and an isosceles triangle has at least two sides equal. Therefore, the correct term is scalene.

Tags

CCSS.4.G.A.2

What is the term for a 6-sided polygon?

• Pentagon

• Hexagon

• Heptagon

• Octagon

Answer explanation

A 6-sided polygon is called a hexagon. The other options are incorrect: a pentagon has 5 sides, a heptagon has 7 sides, and an octagon has 8 sides.

Tags

CCSS.2.G.A.1